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Full text of "Your Computer Magazine (February 1985)"

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Caneda 

Dennafk 

France 

Gnitnany 

Greece 

Holland 

Italy 



C$' 4.00 

DKr. 35.00 

Fr. 50.00 

RM OfiO 

Dra, 29a.0O 

DFt. 3.50 

L 420O 

NZ$ 3.70 

MS 6 25 



New Zealand NZ$ 3.70 

Singapore MS 625 

Spain Rs. 390.00 

Switiflftand SFr. 7 00 

U.S.A. S 3.95 



3.95 (D721631 





FEBRUARY 1985 



BRITAIN'S BIGGEST SELLING HOME COMPUTER MAGAZINE 



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i*"!. 



Spectrum Sproymania and Synsounds 



BM-64 Mars Buggy and Composer 



Animating Amstrad and Deatti Race 



Vic Gunfight and Oric Hero Zero 



BBC Superfile and Hold-Up 




^' 



WHEELS 'N ALL 



>-^' 




erry House, Canning Place, Liverpool LI 8JB 



MIM 



7-i 




SottwarB shorHlst: page 35. 








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Arcades, page 54. 




Sp'-aymania: page 62. 




Hero Zero: page 81. 



22 



LETTERS AND EDITORIAL: In rajuming for the good old Vic-20, a ZX-81 fan wri:es 
aiid the "bcsl" micro scores. 



24 
27 



NEWS: Sir.cla;r's electric tr.cyde. Atari's XE and ST compuxrs with Infinity software 
and CBM 128 details. 



FIRST BYTES: Hel'.o to modems and 
hi to higji-kvcl bt^ui-gcs. 



31 



COMPUTER CLUB: Patil Bond does 
some Saving wit'.i the GLC. 



33 

15 

M Q QUEST CORNER: Hugo North and 
T"*! his latest adventures. 



HARDWARE HrrUST: Hard-hitting liands-o:i cxpcricnx of the new hardware This 
nxinth vic look at -he Opus disc drive and AJAX tnouse. 

SOFTWARE SHORTUST: From the Casle of Terror through the Dungeons of Ba to 
the Witch's Ca-ildron. Recent releases in the Gothic vein. 



45 



v:iipTtrike and d.tch the skitcboaid. 



46 



ENTERPRISE 64: Lee Paddon tries out the sound chii nuned Dave and the video chip 
lumed Nick and v^to it in HniBrprice of ;reat pith and moment. 



rn WORDS: John Dawso.i VieiS'S and 



'Scribes. 



53 



COMPETITION RKSULTS: Who 

wo.i a iiiitlii)!! b)ies? . 



|~yi ARCADE KI.\GS: Tli; pinball wizards arc banished. Meirlon Jones trips through 

56 



' Arcad ia '.o see what new .deas the big gaa.es jompapics have created. 

ZX-Sl PINBAT: Jtist in case youVc nostalgx for the pinball wixarcs, Colin Hogg and 
Dave Rcgers luve regenerated cnc in silicon. 



61 



VIC GUNFIGHT: G;t ofTyjur horse and drink »our milk. The outlaws are cut to g;t you 
but don'l kill any innocent bystanders. Game by James Sullivan. 



62 
67 



SPECTRUM SPRAVMANIA: Computerised spray test simulatDrs can clieck that ar.ti- 
pesi sprays kill the right thing. .'uUan Wood's game is based oi tliis. 



CBM 64 MARS BUGGV: Vahid Azodi gets you out of your rut with a lOugh i iUt; ici vs!> 
the Red Planet. Raster inrerrupc-driven srrooih s:rotting. 



T n AMSTRAD CPC-4e4 — GET TIUNGS MOVING: Ywi can \u>c ihc Amstnd'i INK 
/ J conimand to produce animai.on on-screen. Simor. Janies shows you how. 



81 



HERO ZERO; You .ire assa.lcd by ever>'thing from dus'.bins to ictcream.-; while collecting 
csrgc. A useful disassembler is include.! ir. Jooatlian Richard's game 



86 



UUC HOLDUP: Grab the bags ol swag and drag them :o the getaway car, Barry Wakelin 
adds nev/ dimeasi&ns to the meaning of computer crime. 



88 



93 



AMSTRAD DEATH RACE: C J Leigh's jaj-walking siniula:ioi: reveals a lot about (he 
Amstrad. Add extra commands to your Bisic latera l scrolling. 

SPECTRUAl SYNSOUNDS: Tim 
Gloss soothes the savage breast. 



TELSOFT; How to download ou: 
games from the phone. 



95 



99 



COMMODORE 84 COMPOSER: Full control of -.hcampUmdc envelope, and the pitch 
envek)pc Compulsion doth in music lie, says Philip Gcward. 



103 
107 



TAPE TO MICRODRIVE: Blocks of niadiinc code from tape to Microdrive can 
overwrit; part of the Microdrive Map or Channel. Colin C arr utheis' solution. 

ZX-81 GIANT TEXT: Franf Zym's piogiam for the 16K ZX-81 and has three 
different chtraaer sizes. 



4 4 4 BBC SUPERFILE: B A lJay.or*> 



computerised filing cabinet. 

nfj RESPONSE FRAME: 

Hartnell advises readers. 



I-l-yQL TUTOR: Phi! Holliday 
1 M I 



. im 



123 

I^rTHE INDEX: Your Compmer'i 
V U alpliabcixal database. 



125 



co ritinucs his course. 

SOFTWARE FILE: Programs for 
all manner of home micros. 



4 C i| DATEBASE: Paul Bond rounds up 

1 UT"! 



'micro happenings. 



YOUR COMPUTER, FEBRUARY 1085 





MATCH DAY 

SPECrRUM48k 



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^^^^^Km 



STRIKES BACK 
SI>ECTRUM48k 



«'..:"n.U..'-JI 



uJ^ U ^ 



J k 



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Ocean Software 
Ocean House ■ 6 Central Street • Manchester • M2 5NS • Telephone 06 1 832 6633 




you 

lithe 

action 




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SPECrRUM48k 




COMMODORE 64 

7-90 



DALEY THOMPSON'S 



»J3^»f:li Ml 



SPECTIttJM48k 




COMMODORE 64 

7-90 



CX.«aii Software is available from selected bj-anches of: 

mXHiWMmi. WHSMITH i^TlSMS^. LASKYS.Rumbelows. COMMT. 

Spectrum Shops and all good soltware dealers. Trade enquiries welcome. 






Allaciion srroiegy gamesfrom SSI- 

itlastbeK is ^'om diaice to sei bow yon shpenp i£3 
Gaeral in a red battle! The pages of history recrrd tiie 
triimpiis aid Eailuies a: Eisenkwei, Moittgosen, 
Romd anil Vca Mdsledt battled ii Enope and N(ath 
Mm. Bat with a dearthiDkin; stntegEt 
Uk'! yonnclf k cDnmaiid pahofs th: J- 
hlstdiiciis woaU have had a diSereot 
story ti write! 

Di. Gold h pud t* pTfsent four of 'Jie 
best stiatecy games by Stra:egir 
Sinolatioss locjipcxatei: 

KKIGffrSOrTHEIiESERTptchesthe 
BiJIish Foices of Moo(y('Uieiy dimd the 
mi'iht if Rommil aid his Faiuei Divisions : 
in the classic North Abxan cam^aigi 
of 1941. 

BfiTTII FOR MOEHAIOY oumnenos oi 
'IHlay' line 6t!i 1944 aiid relives tbt 
JUiied fort^ attemfit to smcsh title's ^, 
HtlanticWdl, '-" 

TIGEBSIHTHESNGWrttOistrwtsie „ 
legeoduy Battk of the Bnlge as in '^ 
De:8mkr 1944 the Panzer DtrisioDS »[ 
YoR Rimdstedt !iy m list camUe is a 
despente anempt ti halt Enenhowei's 
advandng Ulied liies. 

Wlo will he tht viitoi iiud fho ihe 

vaoquEhed? 

Only yDU bave the 
attiweis! 

And if you're Imkiig 
for stiategr wi'.h aicadf action Ihen 
COHBIT LEAfiHR will lest ill yoQi wits 
depth of thimglt aiii reQexes in this 
toughest oi battle cballoiges! 




-tne worWs No] war game company 



OT ATARI 

Spectrum \«r9ons 
avaac3bfesoonl 






COMBAT 
LEADER 



A#e'' 




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"^mm 




STRADEGIC SKVBJLAnONS 



Afantastic fight to the death 
within your own bloodstream 




■■.^ 



...Tlirouglnthe 
miracle ofDr Hackers 
REDUCTO-RAYyoufind 
yourself inside the 
body of a very sick 
hypochondriac YDur 
only escape is to 
reassennble your 
submarine which has 
broken into eight 
pieces and 
distributed itself 
around the 
body Not for 
the weak at 
heart! 



MICRO-SURGEKT FROM m 

QUKKSfLVM 



on tne48KSpectrum 



.■/ " ,•■>' 




Telephone (0202) 891744. 



WHSMITH 



woaLwonrH i/j«^n w^mi^ \ 



Mi icaling *B»IIJ»l6 (vaOtn and ifwculrsi rv,:;,iV:t uoin 




Thf most powerful tdclkit yet for ZX BASIC. All the features 
you wiP ever need: AUTO insert, juU REJ^UMDER, blcck 
DELETE, CLOCK, ALARM, error trapping, break (rapping. 
Full TRACE with single-step and much mvch more, ^fakes 
ZX BASIC easyto-ase end powerful 




£14 



An excellent 6ssembltr, en cdvanced line-editor. * compfe- 
keniive disssscrtbhr and a superb fivni panel' debugger 
elf in one package. Used by tuiny leidir,g iofi'^are houses to 
write thiir gomes. "Buy it I Adarn Denning 1?84 




£25 



A powerful and almost full impJemtntotior. of Paxal - not a 
Tiny Pescal A vtluMe educational wtd development tool, 
programs typicelly run 40 tim?s fister than a BASIC cqvivaknt. 
Spectrum version inclidcs Turtle Graphies pickcgc. " I haven't 
SKen any othe.' rnmpilt>r that muld matrh Hi%nft'^ Pna-nl' 





100 High Sunt N«nh 
lei: (Uti»l«'J 04^1 




*Cnmtnnitnri!-R1 
'Dragon 32Sf64 
'Atari 400/600IBQO I4BK) 



*Acori Electron 
'BBC ModeVB 
♦Tandy r'r. {3?K) 



NOW ON ZX SPECTRUM 48K 

747 Flight Simulator 

from DACC —The Simulation specialists 




OACuol screen photograph (BEC vtitioa) 

Uiiiiv^illcrJ til 111 uiiUua.iiblt! lut actsjrajy anc realism the 
DACC 747 Ftigit Simulalor is the most successful of its kind 
on heme computers. The onlv simulator which sho/vs all Ihe 

essential flight nnc engine instrumentaiioii Of llie JuiiiUu ,ul, 

as they realty aie - real dials — and with a precise 3D view of 
the rinway. The coritrol and response of iho 747 arc- faithfully 
reproduced uong genuine ocro cynamics formulae, Clart 
options iiclude take-off. random landirg approach, passenger 
ard fue lead selection, etc. You control tie throtttes, 
clcv3:ors:, ailerons, flaps, spcilers, laivJiny qoar, hrakor., 

rei/erse thrust, etc. Joysticks are optional on all but Dragon 
ard Tandy versions. 

Cassette C9,95 (inc. VAT and P&P) 

Spectrum version £7.95 (inc. VAT and P&P) 
CBM 64 Diskette \/ersior, C'l.SS fine VAT and P&P) 

WE DESPATCH WtTHIH 48HO0HS 

Order dieect from: 

DACC Ltd. (Dept YC3) 

23 Waverley Road, Hindley, Mr. Wigan, 

Lanes. W!\I2 3BN. 





\ 



for the ZXSpectrum 

Hisoft is pleased to announce e ne>v compiler for this popular 
ard effective systems profrtmming language. Sot a tmy-C but 
ar. extensive, ensyto-use implementation of the language . 
AUoM direct exccunon of compiled stmcmcnis. Supplied with 
fitnction libnry. Amilable direct from Htsoft for uS, or write 
for furthtr details. 

AH prices. UK dtlivtred. relate to 48K ZX Spectrum veriioni. 
Our ioftwart is available for many other ZSO machine* ejc. 
A-nstrad CPC 464, MSX, Memottch, SHARP M/JOO, ,\ew- 
Brain, CPlMetc. Flecse vritt for derails. 



DON'T 

VAT 

THE 
PRESS 

There are strong reasons to believe the 

Chancellor of the Exchequer is planning to 

impose VAT on your magazine. 

Such a move would turn the clock back 130 

years — the last tax on newspapers and 

journals was repealed in 1855. Since then 'No 

tax on l<nowledge' has been a principle 

agreed by all Governments, even in the darkest 

days of war. 

A free Press is a tax-free Press. 

No Government should be given the power to 

impose financial pressure on a Press it may 

not Mice. 

Tell your MP to say *N0' to any tax on reading. 



Issued b> the Periocica Publishers Association, _ondon 



8 YOUR COMPUTER. FEBRUARY 1985 





e and reliable 
from mkrit 

morejcPS 

money 




.^.. 



fjTl 



nikroP 



CPASO-IOScpi 

* EPSON COMPATIBLE 

CPB80 -130cp! 
+ IBM COMPATIBLE 



^?J 





micMpT 



Mf»165-155cps 

+ =PSON COMPAT BLE 

NLQ PRINTER 



£329* 




Even in today's high tech world, for nost of ui. the written word 
is still :he least expensive means ol sending anc re;eiving informat- 
ion. If you own a microcomputer the chances are that sooner or later 
later you are probably goiny lu iiucJ u (jiiiilui. 

ffliCfO P - CPP40 

A low/ cost 4 CO our 40/80 column printer/plotter caoatle of print- 
ing text or graphics on plain parifir. The CCP4C is an ideal compan- 
ion for small and portable rricro's, as it is fitted with re-chargcable 
bat",eries — perffici foi beginners. 

flliCfO P -SHINlAiA CPA8C 

With 100 cpi qialitv printing, iheCPASO probably gives rrore ops/ 
£ than any other printer available today. The CPA80 is packed with 
features you woulc normally fiid on a more expensive printer. 
Witn an optional RS232 version ovailable (even for the QLi this 
Epson compatible printer w II hook up to a most anv micro. 

See them at your local dealer tod3y! 



micro P - IVIP165 

Looking for a matri.t prin.er as well as a daisy wheel? Well, the 
MP 165 combinci all the attrioutes of these tuvo tedinDlogies tc 
g ve a matrix orinter ccpabtc of Drinting st up to 1 65 "ps, as well 
as providirg crisp N:;ar Letter Qjal ty, (NLC) prin: at 75 cps. 
Features include o 2k buffer as wei a& both "riction aid tracto- 
feed. as standard. Iceally suited to most popular micro's, ths 
MP165 is now available in a new RS232 QL compatible version. 



m 



fflicfo 
Peripheral/ lid 

THf POWER BEHIND THE PRIhTED WORD' 



IMTEC UNIT 3. HASSODKS WIJOO, WADCnOAD, 

BASINGSTOKE, HANTS. ENGLAND, RCiS^IONE. 
Telephone! BASINGSTOKE (0256" 473232 (32 line;). 

To ox; 85D6€9 MIC^OP G Focaimi c: 0256 461570 

•Ful \2 monlfs VMrrarit\ - RRP «x. VAT. QL is a registerftL Tradu Mark 

of 3inc1ai) Resea'Ch. 



AMSTRAD BBC CBM64 SPECTRUM MEMOTECH NASCOM ATARI 



ir 

3 
3 
3 

3 

3 

5 
3 
3 
5 
5 
3 
5 
3 
3 

3 
3 
3 
3 
3 
3 
3 
3 



\AJ^ 



^$=^^ 



^^H^^ 



^ij^lZl^ 



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"You really can't go wrong with any Level 9 game 
as they are all brilliant" crdsh Micro septSA 





-^3^^^ RETURN TO EDEN 

Level 9*5 first amazing full-colour giaphical adventure. 

'il ft Return to Eden Is the long-awaited sequel tc Level 9's top-selling Snov/ball 
^^WT adventure, set on the weirdest planet ever. Now it's herewith 240 locations,''' 
,;)/, 1> masses of puns and puzzles and with hundreds of pictures in the 
('''AV^iyl AMSTRAD, CBM 64 and Spectrum versions. 



,,V'-'''"^ 



*^ZYsl 



"Whichever machine yoL ov/n. 
, if you have the vaguest tendency 
'■' I towardsadvencure playing then 
vai must tr/ one of these games 
: (unfortijn.irpivvoii'll probably pnrt 
. ) ; uc wanting to buy the lot." 
\// ~ Computing 7oct;,y. Aug 84 

'i\ ■ The Level 9 Adventures are 
\v' suiDerblydejionecand 
' programmed, the content first 
,,- , rate. ~he imole'neitation of 
' Cclossal Cave (Adventure) Is 

nothing short of brilliant: rush out 
' and txiy it. V^^hiie vou''e at it. buy 
their others, too. iimoiy 
I! smashing!" - you &;. June s/t^"^^-^' 



"Level 9 - argujblythe prodjcers 
of the best adventure games in tha /> / 
UK - liave done it ?gain. Lords of 
Time s a sparkling addition :o its 
<^rahlpnfwinn(:r<;" 

-Acomuser,ji^ly84 





?i>*'.'i.„v'^'A't-'^^^-^ 



f: 



"One of the best adventure game 
ihaveeverhadtheDlsasuretoqet /y 

>' my hands on. I can recommend 
r Dungeon Adveiture without the 
?liOhtest fear oF being 

. contradicted. This is s massive 

' sojourn into the unknown." 

- Mcmoped. Oct 84 

"The Saga o- Er k the Viking . . 

a rcrrarl<obtc Adventure gome. 
/ It carries all the hallmarks of a Level 
' 9 Adventure - problem, text displsy 

fi\Ki si^e of »iap - with graphics of a 
K stancarc i have net yet seen before^ 
). in an Adventure: '',.»-*, 

/ - computer & t/iaeo cames. Oct 34 ' "' 



pwl 



*vc^:^^ 



95 



^ ^/y. 



, "I thcroughly recommend these 
> Adventures, tf'iev are excellent 
' value for money No self respecting 
Adventure-addict should be \ 

wthoutthem. I beiici/e Level 9ar€ 
producing a series of Adi/entures 
^ii\ which should be rDoarded as 
v\ Classics." - P3ge6. M)i_S4i 

Available from the HMV Shop and good jK^d'^^M^ ■l^\y:/f^^ 
computer stones everywhere, fyourlocal '^ ]i-^::J^^^^:.^:r-~^^^<sS 



i\ 



ir 

3 
3 
3 
3 
5 



dealer doesn't stock Level Dad'yertures 
yet. use Wie co jpon to buy them from us, 
or asK mm to cDntact: cent'esott, 
M crodealer Uk, Lightning, Leisuresoft, 
R&R, Lime Tree. PCS (SW), MCD, 
/ wonderbridge etc. /2 






'■'«*«*■ „^'' *'„'?? I ENC).OSE A CHEOUE/PO FOR C9.95 PER - 




caosML ACvcinufit ine anK 

rooms. 

AO-./ENIUHE DUESr Anepn Jur7fi 
jOirnevD^rouan Miaai^ E.irn 

ciLNOE0NA0VEH~u)}E 41 Tieaiu'e-i r* 
iiMina'.oo- puzzles to $o)j«. 

SNDV^BAii: iTvmeise saenae Fioon 
game •^■tn o«.' 70M focariont 

RCaiRf< TO QDEH \te(in3naii 
atiftmure. tAtnstoa. COM (Azna 

LO«CS OF TINE: Ur^ia'.mUv^tfMV 

ttiiDuah vvDiia liiftor* 

ERKTHE VKHC: ramiivoirreforBfiC 
CBV1 « ina ipectium onlv. *Ji vvrti 
13:>- Ectures 



D 
D 
D 
D 

n 
n 

D. 



n 
n 

D 

n 
n 

D 



CASSETTE OR £11.95 PER DISK 

Myrame 




My micro is 

(one of those listed below (WitJi at least I 
32K). send :oupon to: | 

LEVELS COMPUTING I 

Dcpt Y . 22C Htghcnden RODd J ^.. 

High wvcofTibe. Bucks. HP13 5PG I 



AMSTRAD BBC CBM64 SPECTRUM MEMOTECH NASCOM ATARI 



10 ^OUH COMPUTER PEBRUARY 1982 



7 busy characters, 10 lost chords, 12 hours, 48 Traffic Ward^ 
95 London Tube Stations, 126,720 square feet of London, ^^ 
7 million Londoners.*. 943 action filled screens. -- 







Mi'- ' *^ '-A • 'tj 



^\ 






■'•I- -Si 






tWhenthe 
music stops, 
he mysteiy 
b^ns*** 



I 








CO/.AMODCRF 64 -£7.99 








c 1985 




single disk drives nave 
been subjected to the 
strict safety demands of 
theBEAB 

They tiave now been 
awarded BS415 approval, 
so if yoii value safety do 
not trust it to anything 
less than Cumana 
^^umana 's dual '-ange of 
"^^ disk drives have 
also been 
submitted for 
approval. 





So now you have got your home computer, you're read/ to talk 
to Cumana- the best name in memory. Already a market 
leader :hroughout Europe for their range of disc drives, 
Cumara now have othe' products on offer, all :o the 
^ same exacting standards that have mace the r 

disc drives the number one choice in the 
luriivcinU in ^Jucaliuti. 

The Touch Pad 

The Touct- Pad is a low-cost graphic 
plotling aid for the BBC micro. This 
comoact cisplay cursor mo\/ing cevice 
simplifies orogramming with the touch of the 
stylus. 

The product comes complete with an instruction 
tooklet, basic softtware, stylus and connecting cable. 
Its uses are in graphics, computer aided design, 
education and games. 



r.^ 




£69.95 

incuding VAT. 



Disc Drives 



fx^^DRjV'B 



tX^ GUIDE 




Cumana have spent years on mmsL 
research, development and marketing 
c range of d'ives second to none. 
Their drives are compatibfe with BBC. 
Spectrum, Dragon, Oric, Tandy 
Models I, III and 4 and Video Genie. 
They are fuly guaranteed for 12 
months and approved for electrical 



safety by the D.M.E.E. anc are 
extensively used in GLC and LEA 
establishments- Cumana were the 
first independent d sc drive supp ier 
and are now Europe's market leader. 

[8£Their products have been proven in 
the schools, universities and homes 

I througtiout Eurcpe. Let us drive you in 
the right direction, send now for 
further details of the Cunana range, 
or see tiem at our distributors and at 
selected branches of W.H. Smith, 
Lasky's, Greens. Currys, aid 
Spectrum UK. 




The Acorn Electron Computer 

A microcomputer with a provan irack record. Using 
BBC Basic, the Electron was deve oped out of the 
Miuu Ihal has been chosen for over 80% of schools 
paricioating in the Governments current IVicrDS In 
Schools proJRrt |- conrecls into alticst any TV set 
anc cassette player and is supplied with a 
comprehensive Use- Guice whi:h runs through, in 
a simple to follow manrer, the basiD principles of 
programmirg. A v/ide range of software s available, 
inckiding games, 
educational packages 
anc home 
accounts. 



Cumaia price 

£199.00 



■V 



Disk interface now availaDle 

for the Acorn Electron, details from Cumara. 



Diskettes 

Only when Cumana found adouble 
density diskette up to the r stringent 
qualif/ CDntrol requirenents and at a 
Drico :hat n^ade sense to ihe end user, ^^ 
were Cumana ready to put their name . 
to it, ; ^ 



The rest It was a top quality dis<ette, 
comp ete with a plastic protective j 
case tor the ten-pack (they are also . 
sold in two-packs!) '-ogether with 
index stickers. 

CuTiana diskettes ere available now 
in both 5Va inch and 3^? inch as 
single nr double-sided, 40 or 80 track, 
from your local computer dealer. Don't 
trust it to chance, go for the best name 
on record. 





CurranaBBC MicroccmpulcraXTipJtiWedis<Or:/i;;- 

roiai price list. 

CurTanadiskdriv?5SUEi{>li3dMi|h fix md ling dis^ctli), 

dtivecornflcSngcabltanc CusMrif usergude. 

tndepondont aowt* supply mains kad and moulded 

./luyiiiklutJ«U. 

CSl)0 4JTrasksmgtesid€d(lOOK) CI 59.95 

CS200D40Tackdoub(e &dcid(20(<K) 1203,95 

=SaOOaO Track cnglacidod<200K CI 92.95 

;;S'100 80 Track doubts sidbd (400K) £21 9.95 

00200 ax 'IC Track amglo iideJ (2C0Kt 
nOdflOn? X 4n Tftr.k itriiiHo e.it^d (dfWK) 
■JD'WO/S 2 X 80 Track Jingo sided (400K> 
OOBOOiS 2 X SO Tiack Jout)l« sided ;0O0K) 

DurranadisK drives with indnrionrifnt nnturtr ';ii|>ply. 
nairs loid andphi^. Exckdm; oth«r aocessorie}. 

3S10OE ■)<) Track Jingb sidod (lOOK 
:S2D0E3 -tOTra* dwjblo sided (20OK> 
3S2DOEeOTfacksinge sided I200K) 
JS4D0E 80 Trnckdoublo sidGd{40CK) 

:^urranadisKdriv«£ suppli,-(J with iorrnultingdislMilto 
ind Ciirranauswciuito P^wci supply likonlroiii 
3BC Mioocomputer, vtith Itad uippliod. 

3SX100D 40 Jiaii< uingto siduc (100K) 
2SX?Ji(l^ 40Tc.li* dOjblCSidCd (2(K)K) 
3SX200 BO Track smgo sided I200K) 
:;SX40000 Track Double sided(4aOK) 

JVr INCH DNVeS 
CSX351 40 Track sing o sided (100K} 
CSX354 00 TackdouWo skted{40CK) 
CD)(3522 X tO Track sinqle sidod (iOOK) 
0D;k3582 x EO DwbUt Sided ((OOK) 
Thft'X' rjngQtukcsilupuwur (turn your m 

CS3S1 40Tra:ksnolosldtd(OOK) C169,95 

0S364 80 Tfijck double sidcd (4Q0K) t229.95 

CD3SZ Oual 40 Track lingls siced (200K) £299.95 

C0358 Tun! 10 Track douUo siJott (aOO<) £429.95 

ino'Ub rafiqoccfiwsconplots wiih po^er supply. 

DISTRIBUTORS/RETAIL 

Available from the following retail cutlets: 
(A/.H. Smith, John Lewis Partne'ship, 
3rf.eri.s t fiisii'P, I askys, SpectrLin UK. 

Area distrlbttors: 

Addons Ltd. (SoLthampton. 0703 34775^6, 
Audio & Computer cenfe (Jersey) 
0524-74000, Eltec (Bradford) 
0274-722512. South Waes 
^'erlpherais 0633-841760. HCCS 
Associates (Gateshead) 
06C-2-621924 HtghSymons 
;Dourrtemouth) 020S-26535, 
J. S. S^mnetl Computers (South 
.ondon)01-5'11 1495, Kingdom 
Design (BeKaat) O202'e43720. 
Jghtning (Harrow) C1-969 5255, 
yicfoage Dislrtbulion (North London) 
01 205 7688, Microworld (Edinburgh) 
031-228 nil, Nat onalVicro Centre 
;Slockporl) 061-4298080, Silicone 
=xprGss (LoicQstsrshire) 0533374917 
Thcmpsor Cook (Birmingham] 
021-328 3895. 
-^ National Dfialpt Nfitwork 




(CUMANA 



^i^ 



Cjmana Limited. Pines Tiading Estate. 
Bead Sireet. Guildforj, Surnsy. 3U3 3BH 
Telephore: 0483 503121 



A II Prises Inclusive of VAT. 

All 80 Track s w Drives are 

Switchable to 40 Track Mode 



Ask an expert why 

the Electron's the best 

micro in its class. 



Most schoolchildnMi will U^U voii that one fonipuUM' 
prevails in F-li-itish c), "is? rooms today. Arom's BBC Micro. 

With a hintof pride. lh(^\1l ul.so t-zll von tim. llicvn^ 
Ouent in ilie cojiujuter laii^uaffe wliich Acorn develuiied 
for tlio BIK": Micro. Its called BBC Basic. 

And il you ask tlicii advice on choosing a lioiitc 
compukM- for around .£200. ihcy're likidy to tell voii tliat 
thei'.rs regally only oiu; sensible choice. 

The £199 Acorn IHectron. 

Like its £3<)9 slaMeina'.e- hut unlike any o.hcr rniero. 
the Electron speid;s P>li( ! Basic. Wliielimei;nsth;it children 
can i^asilv earn on with their conin.ittr t-tudie.s at home. 
And their parents can quicidy 
start catehjn'j; up, be(;aus<' BBC 
Basic is such a ?imj)le lani];uagc 
to learn. 





. lloweven language isn't tlie only tlii ng which makes 
the Kloolmn outstanding among every other micro in its 

piicc range. 

■\ poAvoriul choice. 

The Electron is a 64K microcomputer which has 
32K i>r BAM, ixmdiiind with anotluM 32K BOM. 

This simply means that it has more poveithan most 
people ever need from a home (:oinj)uI.i'r. 

*N<;vertheless, it lias been designed to heljiyou make 
the fullest use of its power 

I*br exam})lr. its graphics have the highcstrcsol 
ntion of any home (computer h:ir none, 

'I his is bfcause .'\coni specic-dly designed ih.; . 
chip that controls the graphics. And it's among the! 
most advanced clips of its kind. 

Indeed, it delivers twice 

as many itluiraeter.s a<:roi^s the 
screen as the Electron's nearest 
rival. 

ft expaiidif into a system. 

With the Electnm. even total 
iKiwcorntu'^ have ho<Mi siir|:«rist;d at 
how ((uickly they can hnd llnMr way 
intothecomph^Nj world of computing. 
Where many coniputers have 
ktyboaid; which arc confusing and 
clumsy to t>iicrate. il has a kcvboard 
jiml like an oidinarv electric 
tvpcwriti'r's. 

And for issuing main com- 
mands, there aresinjih' cntj'v kevs. 
Lnsiead of literally spelling out the 
command, letter by letter, you just push the 
relevan: koy and it's issued. 

There's alsoa liuilt-in loudspeaker v hich 
gives high (|uaJitv sound. 

And what is perhaps moslexeiiinij; 
is that the Electron has the capacity to 
^row with your know-ledge and 
ambiiion. 

With Acorn's Pins 1 e\-pansif>n 
module, il (ran link up with a printer, joy 
sticks and fast-lo;id rrartridgft software 
including View and Viewshcx^l word pro- 
cessing .ind spread sheet programs. 




./ 



With the Plus 3 inodiile, which 
will soon be available, you'll liavi; a 
disc drive system and will be able 
to enjoy all tli(i speed and conven- 
ience of 3.5 inch discs. 

But let's not get carried awav 
Ino quickly. You can start using and 
enjovirig your Klectron as soon as 
you get it houKv 

.'Ml you need is your ti'le- 
vision set and a cassette recorder. 

The spcc(j of a bugJnest; n-i<:ro. 

Some home (!(iiiipiilers 
r esporrd prcUy slowly to your 
(oinmands. .Vfler you've 

jjressed the koys, lh(;y leave 
V')u (vsiddlinp your 

thuinhs lor more than a mere few 
seconds. 

The plodders, how- 
ever, are a ven Ions; way 
behind the Kleclron. 



<• it> 111 lb rk )b m i> 



itiiUiiiiiiii; 



And w'heii it's givt^n yon 
^onie new ideas about home 
.uuroiintlng, it will chidlcnge you 
to a tew garnt^s and even spend a 
few seconds doing your whole 
family s biorhvtnnis lor vou. 

But remember, although it 
iiolds IS protrrams, the cassette will 
only give you a «liinpse of the 
Electron's full potential, 

BeeausL- the potential is as 
iiihnite as your own inuigination. 

No !?horta j: :; of software. 
;Vltliou{!jh the Klectron is 
still a relative ncw(;onierto 
the niarkel, the range of software 
available for it i-s <;ont-iderable. 
Besides plenty oigamcs.thcrearc niaiiy cdu- 
(raiioiial pro^'raius for elii Idren of all ages, from playschool 
to .A Level 

There's a great deal to keep adults occupied, too. 





honi nu)n(;y management to helpful domestic 
I II fact, on processing programs, even a ni nge of foreign lan<Mjag 
spe;*d,a recent programs teaching the basi<:s of 



bench lest 

SUIVCY 

-ankfij 



lh( llr ■tn)iiuj)wilhsui'hhi^hnirr.<asllu"lBMPCaildthe 
.Apple 111. IJoth arc machines which cost well over £1^000. 
h's an astt>nishing ac(;oladc: when the Electron makes 
n(» greater claim than to be a micro wliirb is d<';*ign<Ml to 
bt;comc pjrlof the family. / 

Your starter for fre(*. 

With vour Electron, you'll receive a free Intro- 
dudorv (!assettt\ 

li will give YOU a taste of the exceptional colour 
gmphics. It will show you how tl.e Ele(;troncan ])lay and 
notiite music 




I-Venoh, German, Italian and 
SpanisI 

And of <^ourse,with 
itssimpli<rilyand 
flevntiiity, the 
F,le<'tron could 
atuyn be 



procrsj'ing prognims created and writu;n by none other 
than vourstUl. 

You ciiu had the Aeoni f lectron with ilh full 
ccniolcment ol a(<essurics and software at local Acorn 
dealers and major high street stores. 

For the aihlrerss of your neani.sl supplier, 
ring 0933 7<>300. ' 

Tlie Acorn S Electron. 









ii[;- ;:•>•'. I •-* 






48K SinCLAIR ZX SPECTRUN 




i?.54^- 



s< 



--"•i 1 




TillPW-SSi^Wf^^^S^ 



■4Vr=^j?v 






_4/win 



k\ 



.- - i 



i^i^,'. 



r^ 



'.':<' 



i^se^-: 





■:'-<' 



^^ 



^ 



f--)— ?£tgj 



"ALIEW 8" recommended retail price £9.95 inc VAT 
Available from W.H.SI^IITHS, BOOTS, J.MEINZIES, WOOLWORTHS J 
and all good software retail outlets. Also available from 
ULTIMATE PLAY THE GAME, The Green, Ashby de la Zouch, Leicestershire LE6 5JU 
^. (P&fP included) Tel: 0530 411485 ^^j«s»2^.^i?gS0«ft 






^••i;l**t;r' Ij 






48K SINCLAIR ZX SPECTRUM 



■k 



i>->ii»i.;2 










ii! 



%?*TaBSs*sr 



BBC nODEL B 1-2 OS 
48K SINCLAIR ZX SPECTRU?! 




48K SINCLAIR ZX SPECTRUM 





<m^f^mi<m- 



COnnODORE 64 



•X -A-:.- : : 







i-N^!? jtfljir 



>..TS6-5: 



'KNIGflTLORE", OJNDERfrURLDE", "SABRE WUIT", and "STAEf OF KARNAIH" recommended retail 

price S.935 lite VAT. Available from W.H.SIt1ITH, BOOTS, J.I1ENZIES, WOOLWORTHS and all good 

software retail outlets. Also available from ULTIMATE FLAY THE GAPIE, The Green, 

Ashbv de-la-Zouch, Uicesterehire LE6 5JII (P^ are included) Tel: 0530 411485 



# 



LClS 



The artifact is just too tempting, ' 
Sure, no one has ever returned 
with it but they didn't have youi 'M 
brains and courage. 

This treasure is worth any risk, ^ 

An artifact containing the total 
history and knowledge of a lost, 
forgotten civilizationi Just think ^ 
what that could do for your careen 
for the university museam, aid for " 
y ou r ba Ilk balance I 
Of course, there is the small matter 
of finding it. The perSs en route an£ 
sure to be the most fiendishly - 

clever traps and puzzles you're ^Sf^^J 
ever faced. Youll need all vour skilT '^ 

iji.* • _**__ • * I 



I hen there's the ancient curse f. , 
but what the heck; if it were easy, . 
it wouldn't interest you. 
Dr. Jones -would it? 




I 



k 



0(^ 



CASSETTE 



£995 





Dbtributed In the U.K. by U.S. Gold Llitli1e<t 
Unit 10, The Parkway Industrial Centre, 



-J r^Tif-ijciiiratlH ifn linrf 11 ki 1 1 



Telephone: 021-559 3020. 



Xi 



MIND'^CA^^t INC 



■* MNCIAN4 JONES IKflHE LOS" KINGDOM, 3»m««le-neii:s and chara dW iii tt B S Bid llktnesics tr* tradenaite ef Likwsflhn Itc. Uwd hj M!rdscip«, Inc., Authorised Dser. 

1»e4 Lucatlllir Ltd BndMindsctp«.l>C. All Rla>«l£R«servel 




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* UNLmJTED VOCABULARY 

* CLEAR AUDIBLE SPEECH 

* COMPACT, STURDY & BUILT TC LAST 

* USER FRIENDLY 

* COMPREHRSSIVR MANUAL INCLUDED 

* SELF CONTAINED SPEAKER 

* FULLY GUARANTEED FOR ONE YEAR 

* POWERED FROM HOST COMPUTER 

* VERSATILE'. - the standard SPEAKEASY module cm be 
prcgrcmmed to speak in any language, for example ENGIJSH, 
GERMAN, NORWEGIAN etc.. .. THE SCOPE OF THIS PROD- 
UCT IS ONE Y UMITED B Y YOUR IMACINA TIQN! 

* COMPATIBLE u/ith moat populta iniviui. Tl.v ituttduid 
module can b« connected to virtually any computer via our 
large range ofir.terface cables. 



JUST 
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INmiir'ACK CABLES Cl'RRENTL Y A VAJLABLE 


*C3.M M 


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* VIC 20 


*ORlCfATMOS 


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*imAGOt\ 32/64 


HiF.MOrhjCSi 
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REMKMBF.HI... Ifyo* changp your tompnicr, you only need 
to ch^^g^ thf inlerftcc cable! 



PLF.ASE STATE iNTKliyACE l£AD REQuinED 



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PECTRU^A 




AZTEC SOFTWARE UMITED, i7A STATION ROAD, MIRFIELD. WEST YORKSHIRE. TELEPHOME (0924)492826 



Herble Briggs has 

just destroyed the myth 

that all floDDV discs are 



created equal 



They seem equal. Until you look at 
the sean:s. 

That's where eqihility ends. 

M(.)!>t companies seal rhcir discs with a 
spot here, a spot there. Leading most of 
each scam not .sei'Jed at all. 

Sooner or later, the semis m:ght do what 
comes naturt.lly: they bulge. Warp. Pucker. 
Open up. 

Pens, pencils, finLj;ernails even a four- 
year-olds, like Ilcrbic— can catch and snag 
in those wide open spaces. 

That's sloppy. And dangerous. Bccau.sc 
if ycu pur a slopp)' floppy into your disc 
drive. It can jam your drive. Ruin ycur drive 
head. Lose vour data. 

So much for their 6e».nis. Ours are 
different. 




Memorcx uses a process we developed, 
called Solid-Seam Bonding. 

Solid-Scam Bonding seals shu: even' inch 
ofe\'cn'Scam ofcvciT Mcmorcx^floppy dise. 
Ti2;ht as c. drutii.That makes the Memorcx 



floppy sritTer. Stronger. \i:d your dita safer. 

To le.sis. bulging, warpint;, puckering, 
or opening up. 



MEMOREX SOLID-SEAM BONDING: 

\Lvcr\- inch of even' scan 
i$ Mxitcd shut, Tie;ht 
as jcinim 




To resist ail the things that can jam 
your cirive, ruin yourtirive head, or lose 
your data. 

Which proves that a Memorcx floppy 
disc isn't equal to all the others. It's netter. 

Solid-Seam Bonding is jas: one example 
of the extra care that goes into c\ery 
Memorcx floppy disc. Be it 8." S^" or the 
new 3V2': Fxrra care that lets us i^uaranrcc 
c\'cry Mcn:orex disc to he 100% error-free. 

"Fhc next rime youVc bu\'ing a flopj^y 
disc -or a few hundred of them— jast 
reniember th:s: 

It"S always belter to be safe than sloppy. 

For more information on the full line of 
Memorex cuality eompuler media 
procucts. including computer 
tape, call Memorcx U.K. Ltd. . 
96-104ChurchStree:, ~ 

Staines, Midclesex. 
Tel:07S45I488 




o( Memcrex Corporaion 
1964 Memorex Corporation 

Jk RiirrfH ghs Compjny 



Your Data. When it matters, make it MemGrex~ 

MEMOREX 



fouRuemRSi 




EPITAPH FOR ONE OF THE BEST 



^s a cnc^im^ owner ol'tlvi V:c-20, 1 fcl'. ihat I could not let this 
Yf GrancJaddv of conpiitcn be pit: to res: wnhoui, it kast, a brie" 
cutogy. 

Since the Vie-20 was brought onto the market, a lot Iws tliangcti 
in \\\v AjnilH of (-nnpntiTs Tis im twl graphical and niuticat 
capabilities plus its niinutj uoemory did not give it much of a chjncc 
against today's 64X hi-res macstros. 

h\>cti so, the eariy cays ol Vic-computmg will iJways be, lor mi;, 
the "gocd old cays". These were the diys when j'ou strcggLd to fi: 
a lot of program into a tiny bii of memory — s thing ihtt every 
computer-prog:air.mer ought to have to dc. Tlie mcga-muiixirics of 
today's (AK. elephants arc asking for doppy and wasteful 
progranr.nung. 

I will never forfjct the hours 1 s^-ent typing thj latest Baiic pro- 
gratti Ironi the pages of Ycur Computer, because ihcrc vas nothing 
esc availab'c. Does anyone do this today? Ba:k in the cays of Vic, 
you spent nights poriag over hand-assembled machine code. Com^ 
pilers were things you dreamt of af.er your trus;y Vic20 had 
aashed for the fifth time. 

Don't get me wiong, the computers ^f today ate a lot bct:cr :han 
the Yic-20 but, somehDW, all the fun lias gone out of coinpot:ng. as I 
knev,' it. 

The computers of today and their owners l*.ave a lot to thank the 
Vic for. I am sure tha*. the passing of this Model T of the ccmpute; 
world will squeeze a tear or :wo frcm the eyct of many i wmputer 
enthusiast. 

Matihctt {x}sgham. 



GREAT SCORES! 

/fiari xirl- the flattcjy they said 

\ so ... 1 avidly read your maga- 
zine each month amonn many other 
coTipxitcr magazines and I rcriiiinly 
put it it) the first wo ;iric 1 vill 'cjivc 
you and the readers to eiiess A-ha the 
Olhtir itle is. 

; read Afiil" scorn the vsfi scores 
ckimed by computei gamesters tht 
thAUp,;ndr., h'lndrcd thcuf.andr. anA 
ev:n nillions look puny when viewed 
aKiinsl the naKnifu^ni, astoundinj; 
3D, mii;ti[y, nyit I'l' .he an 
acliicvviiiuits thai 1 have obia-ncd 
Jujt read ihij list and listen tc tht 
gajjW of wonder froir. the readers . . . 

h\ Raid over Mo-scow I have dc,v 
iroycd 10,234 stealth bombcre ard afl 
of ihisc inside tnc lanjcr which [ 
have rot namged to gtt out of ytt. la 
Ztxxon 2i,346 jttv litivc hit itio wall 
th« s;rols towa-d jovi at he very 
Start — I 5in)>ly .annot 'ind the firs 
Oi:cninf, ct'cii. On .) f igli sinuiljior [ 
have crashed 40,lXK> limts ai Gatwick 
and in .Solo HigPi 1 .^dually crashed 
ay C.BM-()4 l>y going as higti a; 
pcssihlc and then diving into Kinsa; 
at full speed. 



Oa n;);hl 'i'i'i I cjnnoi c%vn liixl rht 
damn runway »nd waidei aimlesily 
about al. over the flfming airfield until 
I go ofT the edge. \n Blue Mux lor 
some stranpc r<a.son if you ptilt bKk 
on tile s:ick yoii crash brwird lud by 
'c\'crsin!; iKc joystick ( can iiiw hit 
•he tree u the erd o:'the rxwwa' every 
imt. Al the Royil Birkdalc eol:' 1 
A'eni round in 18,000 strokes over par 
and in huumati^rrjl Fojtb:dl I lost 42 
^i\ to \Vm oc-mpiter nt level ofM. 

I »uld g'> on for cwr tut \ don't 
A'ant to n^ake other rcide's cespon- 
dcni alJout hei! own a.lilcvencnii. I 
ust mention thn inthe llorthii 1 have 
had 14,000 attempts le gei (he snail 
door op;n in the very firsi scene and 
alw.ys end up )un:pin» in the snail 
chest which is ;tlwavs e.Tipty. Why do 
■.hey make these games so easy.'?? 

R. Orhiufiiii, 

A><i {•/«<■, 

IfU of Wight. 

NOT A SYNTH 

/n many ar:iclcs aad idveri-s the 
sound laciitics on many cc-m- 
puters are siid lo ix the same fs thase 
found o«i svTiihcsisers. Ihii is not the 
case. In fac, on m'>si .x>niputcrs tou 



can dcfmc envelopes: pitches and [he 
noise lev-;l, but the>* ate missing a 
functbti whidi Mtund ;;cnera:ors need 
to ha\e to be called asynih: tne a:?)lity 
to change thi tinibie O" anunnt of 
hiimonict — manj- hirm:>nic; s 
sharp sound, lev; hirmonics = soft 
s(uitd. It's Ksualy a low-, hiK> cr 
l>iiKl|va.vs filter (hdt'» lucJ to du (lii%. 

I'm saying :his to ivarn pe-jple wlw 
are looking for a .synth iVoni makiruj 
the mistake oi buymg what they Innk 
is a computer-bscd synthcfiser, but 
which actual.y is a computer-based 
stund Keoera'.or — I've r.carly done it 
inyself: adverisets fault! 

As far is I sno>v the oily inacaiiiLs 
wiiich have a built-in synth are these: 
Y'miaha CX5, Commodore 64 atiJ 
Enterprise. 

J<Amw Rtiiiki, 

F.lsMorf, 

Dciinari:. 

TELSOFT WORKS! 

/have luSt irjftd ivo pro- 
g'ami. Darts and DaiaCalc, since 
keyinj n Telsofi on Thur.sdiv 
ccning. Both cxiic over wdl — veiy 
ilw bad jlocks tnd I'm very pfeastd 
vtirh the rirtnltv. .VSirrdtirt is HUn«- 
trotis — 1 c.mnot get it to download 
v-iih anythiu; abtive a five per cent 
chniMc of fiu«cfiA. 

I have a Universal Modem Acapter 
which his enabled mc to icccss 
MiiToma ard vicwCax in the pan. 
Lnfotunatel/, hey have droppid 
'/.X-81 iofi'A'are alto^ethrr. 'I "he 
p'obttni will keyii.g in vinir lorg 
iT.ach nc-eode programs is thst it is ?ll 
too passisle a get tnem wr.ing. The 
checksum is no sroof acmntt geiiirg 
values in ihc ATOig sequence or 
ovcrvritinn snol'ier area of memory. 



If you ignoie the intricaeies o: 4C 
column display shifting etc tci 
accommodate .^restel on aZX-Sl iheji 
your c^ass of cownloadcr is ideal. 

Any^-ay — j-ou may be intciested te 
Icnow ihat Telsoft is fine cm RAC, It in 
Cheshire via an acous.ic tnodeni. 

Kay Pearson, 

Cheshire. 

AWISTRAD DATA 

/would Bke to dear up a few points 
afcxn.it the '\nntr.ul C?C-164, fot- 
lovin;? inlbrmation given in the 
January isjue: 

M Pajc* 14^14*}: The: .Spiitca miivlc 
intptiei the 464 won't stroll its 
wiidoA's. It v/ill scroll, both up and 
do>vn, an\ ot its text wndo'vs. Ihe 
general form of the rcquied :ode is: 
DOWN Lo;ate n,l,l:pi1nt n, "cursor 

up" 
UF Locate n,l,m:prfnl n, "Cursor 

wrere n is ttie ctidnn<3i (winaov/j 
numtwr and m is the lumber of tovi's 
In thai v/indoiw. 

If tile whok-'creen scrolling is 
required, ihe .vindovv t) has not wen 
altered from its start-u}) definiiioti, 
then rhc following i.s all that is needed: 
DOWN Locate I.I: print "Cursor 

Up" - of2"(Ctrl)C(Ctrl)K" 
UF Locate i,i£t): Print "CLrso- 

Dcv/n". Obviously this tecb 

ntque does d srupt the 

cu'sor poiition. 

■ Pafic tbl: Symbol after 127 would 
albw rc<lcfnition of characters 
l2/-2;5, rot 128-255. 

■ I'aiX 173: '.he circledrnving 
routine «<vcn in jro>;rain 2 lakes an 
uaicceptably jlow 1 2 seconds to drav 
ottt circle T.ae following ttkcs less 
than 2'/i «ec<vtidii, and if Sicp 2 lu 



Table }. 








t-LNCItON 


(CHR$) 
CHARACTER 


KfcYBOAHU 


JOYSTICK SCREEN 


Beep (Bell) 


7 


CTRLG 


R 


CSn LEFT 


3 


CTRLH 


LEFT 


CSR RIGHT 


9 


CTRL! 


RIGHT 


CSR DOWN 


10 


CTRL J 


DOWN 


CSR UP 


It 


CTRL K 


UP 


CLEAR 


12 


CTRLL 




W NDOW 








RVS 


24 


CTRLX 


X 


CSR HOVIE 


30 


CTRLE 





ZX-81 MICROS DESERVE BETTER 

IThf si;rvfy condiitrte.d by Shnrpey anonf; Opnn Univ«'rsiry 
/ Students, November 198-1, Yijtir Qjwpi.fcT may have surprised 
a few people. The position of the BBC B aiad Spectrum a? the most 
nwnec-mcriis uas to be e:<pi::tcd, but the hirtl place obtaired by 
the ZX-8 ough{ to — :hough I very much doubt it will — inak; a 
few p iblishtT^ .-»nd .■io-rwarc maruifiicti i'r»rs think again aboiu so 
readily ig.noring this pioneer of i:ome coinputing. 

That the machine is outdated I dn not deny, but :his is surely 
ofisei ny the extremely iow price £t which it ^ nowsellJig. .Soitwarc 
and books for the ZX-81 have becotne cxtretiiely rare, while 
pjihlishers of rcmptite- magazini^s .^fim tn havt^ ff>rgrttii*n hai it 
ever ucist^'d. 

There are, of coutse, some exceptions. Most notable are Software 
Farm, who arc producing probably the best games ever seen an the 
ZX-81 and Your Ct»«/>.ii«- whose listings ani, in the ntaiii, superior 
tn mnii ftjin-niTrial prrijjr-irns ."s-.i T appoat to puWishrrs of hoots 
and software for the ZX-81. Please contmuc to publish, snd please 
let us know tlial you a.'e continuing to do so via advcrtiscmjnts. 

S.r. Kaliszcziikf 
Lytham, Lariaishire, 



22 YOURCOMPUIER. FEBFUARY 985 



inserted iftci ihc For i% = . to 45, m 

accepiable circle !<; prn.liirfrt ii ji m 

Wi seconds. 

10 mod: 1 :CLS : rVo = iCO :>% = 
320 : y^A = 200: DFG: ORIG N 
x%,y% 

20 FOR % = 1 to 45 : a% = rVo 
• C05(iVo);by( - f% ' SIN 
(i%) : PLOT a%,3% : PLOT - 
a%.U% :PLOTa% - b% 
PLOT - a'/o - b% : P.OTb'/i, 
aVe ; PLOT - b'/o. a% : PLOT 
b%. aVc, PLOT - b% a% 

NEX7 
■ I'able ] will help new lecrs track 
curscr uydawn conirol ch;ractcrs as 
the manual i> net iMriioiiarlv Ijclpful 
on this tr.atccr. They can all te iiswi in 
the satnc style as CBjM's ttjrsjr 
s>'>ntolsr 

B '['he 'M muDual laik to give zn 
eiatiDk of how to prim i multioolour 
character The loUo^'inc will p-int a 
wine glais, kitd diiir-dtlcrs hi^h urd 
oitlircd in blacs on a white hac's- 
B-oiind, fillcc with red wine, standirj: 

o) a jluf Ttiat. 
in MODF 1 INKnPfilNKin INK 
2.6 : INK 3.14 : PA^EF : 
BORDER CLS 
20 SYMBOL af.er 200 
30 SYVBOL 200.0,3.204,130.130, 

130.130,63 
40 SYMBOL 201 .-10.16 16,16.56.124 
50 SYMBOL 2O2,O,D.O,0,O.-24. 

124.56 
60 SYWBOL 203.16 
'0 SYMBOL 204,0.3.0.0.0,0,254 
30 glass S = CHRS<20O) + " -" 
90 wine $ - a-IRS (202) f " -" 
1UU Mais = CHHS(204) 
110 PRINT CHRS(22> ( CHRSa); 
HEW turns on transparent tnoc.e 
120 FOR x% = 1 ly 3? STEP 4 : 
FORy»/c - 1 to 21. STEP 4 
130 LOCATE x'/o.y% : PEN 1 : 
rntNT glos3$ ' • " PCN 2. 
PRINT WINE S •'• ■■ : PEN 3 : 
PRINT mat $: NEXT; NEXT 
110 PRINT CHRt (S3) i CHR$(0); 

REt^ reset to normal mode 
150 PEN1 

B I'oiitU'j new men will find u^ciii) 
the use af Ctrl an:i (JSR keys to 
jump from om md to I'le ether of a 
luiiji Utitj jrBa.siL-duiiii(;cdiaii(;. tWw 
not meni oncd directly in the miiiuil 
is the piJssibiUty of rt-cxccuting a 
stmpl: Hisic insiruc.ion in a siinilsi 
way t.i [he CBM cooipulcrs 

Cuisor up to rh; line required, 
"wipe" across it with the copy key, 
ovcr-iypinK any changes on the wav, 
!»n(l ]Tf"S* rnrr Tl"i> rnnimam will 
be obeyed, without the nead for rr- 
tjping it. or Ccpyi.ig it to a fiedi 
Krccn line. 

F Mrrjiv, 

We:i ^jijftx 



swwmL 



CORRECTIONS 

VVkti- (( iiH arcr in iHe dex loitUr for 
<ht SpCi/ntm ^iin.i', /ypiut KkJcts, in 
>hc Jjninry uiuc. A/.Ti-Oui thciiiJ 
sf Ime 'II Moult' hf Jektid and re- 
inscntd ct line 65 

Hs}i>r/ iyf-"X " '*'' '"*■ l*itdt' '" 
JiDisiiry'i Dragon p'ogiLiu, Returti, 
you teiJlo rfrnjj spai< fi" ffit-mitfiinc 
cade hy ryp"U' S'CLHAR S. 

Mm' mutnnr u\l( -.eas ;iicr than « 
liccciiiry in the tisiiig ftr Cli.M ttt 
TiraJiate in .Jaiuar;: Whfu fhr im 
Awd'iT oiki \tiu li> iaf'H lie Hart 
/WJiwpij, ctiiez 3790 and i/riorf thi atJt 

(mm SaXi In :itiP^ 



Price war - hui-! Whai is it good foi.' Absclutely 
nothing T.iai's wlim ilic ceuipuier ir,anufaaur;rs 
would have us belic'/e, but when diJ ihe putlic 
ever lose out from cuMluoai competition .n the 
micro industry? 

The last major price battles were fought in 1983 
\shcn Sinclair ipatkcd a new (.OJiniei by pulliig ihe 
Spearum down to £130 md £100 from its original 
£175 and £1 25. Commocorc answered swiftly with 
Vic-20 cuts and ihc whole campaign h£d fizzled out 
by thai Christmas. 

The rcauhr* — 4 let of &aii&{IcU new tusuiners 
and a body cou.it of computer mantfacturers 
teaturin$ big names like Texas Iistrunieuts and 
Maud, anc sc\'eril smaller ones such as G:\indy 
and Jupiter Cantab. 

All the sign! arc righ't fm a new louni of cuts 
this year, but this time Atari is the company 
tcadiii({ the dowr.ward price charge That may 
seem ironic — Atari was another of the once- 
powtrful ic fall victim :n the 1983 wars. It lost 
$180 millioTi in (he last ihtec ii.uutlis jf 1983^ and 
those financial wounds lay directly behind its sale 
tc Ja:k Tramiel in the sprine cf last year. 

Atari had hoped thtt the XL range of computers 
would Itad to a return to better fortunes. In 1933 
few would have e^pet-icd iliai the £250 top-Cf-thc- 
rangc 800XL would iKcomc Chrisimos 1984's 
bargain at £1 ^0 — and how '.here it talk of another 
cui to take :he 800XL below £100. 

Alone, that would hardly be enough to sp:ll 
chcdpcr cor.tpLtci» Hi cvei/OfK. But it .5 Olie Of 
several mKvemcnrs which could add up to 
important charRes in pri:ins this year. 

How '.vel. computers sold ai Christmas is tnc 
first key. Althcugb tl:e cnd-.>f-Ycar boom couldn't 



be described as disastrous fcir corapanics tike 
Sinclair: CDmmodore and .'Vtristrsd, it did arrive 
v;ry late with all the activity concen.raied in ihc 
list couple of weeks l)eforc iHe 2^th. 

That has resulted in larger warehouse stocks of 
unsold machines :han expe;ted. 

Japanese dreams of an MSXmas tailed to become 
reahty, hit first by a lickof intc-est and then by the 
weak poufid. Tcshiba has alrearly drnpp!vl its 
HX-10 \n tindor £200 and the other MSX makers 
witt ':« forced 10 follow suit to get ilieir over-priced 
machines moving 

Even though Sinckir can outsell his competitors 
with the Spectrum even at its currenr price, he is 
well placed to radsc cuts if he has ic. The prcifil- 
margins in the Spectmir.'s pria;s urc large enough 
for him 10 move then-, dttwn a long way even if t.iis 
time il :sn't Sinclair who siarts the war. The low 
Clip ccuni ir Commodore ni,'i(tiinr>s will also 
permit them to rejig prices if t'ney want to initiate 
the moves o get the marke: moving again. 

It is an open secret that following the ELctron 
principls Acorn is re-enjinecring the BBC Micro 
to reduce production ctwts and irrrp^^^c mrrgins 
That in turn could allow for price cuts. Late-:omer 
Hnterprise might also be obliged to look al a n'.'w 
price structure. 

The final facn)r that hints at lower-cost 
computing is the number of new mmiirr.^rs in tin* 
pipeline. Commodore as well as Atari have 
unveiled their latest products — see :his m:)nih's 
news pages — and the Atiri cuts alieady mentioned 
arc dearly in prqjarjticn for the nc* madiin:s. 
Commodon: tray also reposition tlw rnmputers in 
its existing range by drofiping prices and possibly 
machines. 



:i 



How to write for your Computer 

We t;;illrjd this magazine /our Ccmj)uter precisely because we welcoine you* 
yiews, tips anrt hints and ©ven your criticism of machines ard software in general. 
It you wou d like to ses your name in print, whether on n Software File program O' 
a fLi II blooded article, hero is now to go about it. Idea ly, all orticlCG should be 
typec double-spaced on one side only of unifornn sheets of paper, If listings can 
oe dumped directly from a printer - you can always use a friend's or user grocp's 
this minimises the risk of errcr. In a perfecl v^orld a csssetts would 
accompany thear'.icle. That considerably speeds up the check ng proress Not 
only do you get to air you- own discoveries and opinions, but we will even pay 
you for :he privilege. We pay C35 per published page - :hat's as it appears in the 

magczine and includes illustrations. 
Why not give it a try? You have nothing to lose but your postage. 



ABC 



154,334 
.l»nii»v-..:und, 1984. 



Editor 

TOBY WOLPE 

Assistant Editor 
MEIRIOM .ONES 
Production kditor 
IAN \/ALLELV 
Software Editor 
SIMON BEESLEY 
Sub- editor 
PAUL 60MD 
Editorial Assistant 
LEE PADDON 

Editorial Secretary 

LYNN DAWSON 

bditorial: n-t61 JIM 

Subscriptions: U.K. £1Z50 for 12 issues. 

Pflnto4 ift Great Brittin for Dm prottietDrs 
Bii»ioe« P'««s ot^ftatiorval ltd, Quad'sni House, tfw 
QjtdDnt, Sutton, Sun-a» SW2 5AS. Tel; 01-661 3600 
T^tex/e^Wi; 8S20W 6IPRES3. ISSN ()263088f . 
Pfinted by ^ivseide Prsis Ltc, WKilst«bl«. Kcni. and 
ty^MM by Vistap Ltd, LotmIok EC . 



Advertisement Manager 
>JICK RATNIEKS 01-661 3127 

Senior Sales Executive 
JULIAN BIDUVKE 01-661 8458 
Advenlsemeni Executives 
NIGEL BORRELL 01 661 3660 
KAY FIL8IN 01-661 8484 
Northern Oflice 
GEOFF PARKER 061-872 8861 
Advertisement Secrotory 
MAXINE GILL 

Classified 

LUCY O'SULLIVAN 01 661 3036 

Publishing Director 
CHRIS HIPWELL 

Group Advertisement Manager 
SHOBHAN GAJ.AR 

Vow Computer. Quadrant House, 

The Quadiant, Sutton, Surrey SM2 5AS. 

t") Business Press International Ltd 1935 



YOJR COMPUTER. FEBRUA=»Y 1985 23 



jam. 




Knight on a white recharger 
saves British tricycle industry 



more of a toy than ihc "iccai iolution 
for all typ:s d' local journey" w.iich 
the brjcliurv claims jUhju|;!'i unUvi 
current reEulitions anycne aver 14 
CUD drive ihe C5 electric tricycle ui; 
the road wlrhour IniiirAncc. tax ni 
crfsh iiclmct. 

The C5 locks i liulc like a s.-nal! 
boDsldjjh 11 nd going down the snow 
covered slopes of Alexaidrr I'.lacc 
where ii wan laiinchtd it sometime" 
pe.-foriied like on:. However the 25C 
Wut electric motor whici drivedont 
oTthe bactc uticclt prov«d iiicapablv 
of poA'crins the C5 up ccn tht 
gcatlcst slopes whtcuc using pcda 
puwei. The titiyi.le ^uuii ai<iicc 
imkin; a pliint.vc "l':cp, I'cep' 
noise iignallinK lliul the cnjiinchaL 
ovirheaied. 

On the nm irsck inside (lie 
Alexander Pavilion the C5 shrwec 
how ntuch fu.i a lightweight cle:tric 
ve!iicic can be in a conrrollec 
enuirnnmrnf Tir thr:>i> p.tiiHinf; 
pr:nci:)ies of the Sinclair Vehicle 
Project ai aitlincd by jMana^ing 
Director Barry Wills arc lij^ht-wcighi 
materials, good aerodynamics anc 
indilional buicry iec!inolo.4y with 
an uncoivemonai appraich to 
deiign going bach lo firtt ptinc.pks 
ra'her than adapting existinc 
ve.iicle&. "W« doiVt tak« a standard 
car, van or bvs'' jays Barry "and rip 
out the c:nginc :o rcplicc it with 
bailcrics and electric ino:or." 

The C5 is coiipromised by tht 
ncEd to 3Dcal< in unt-cr ihc qua.nrly 
named Blcct.'icaily Assisted Fcdai 
Cycle Rc^lstior.s 1983, This layi 
down a rnaiximum power of 250 
Walls for the engonc which gives the 
Cy a top speed of 5 mph on the 
level - le;s than aiosi C}«clists would 
mmage. 



Witli niw Irad aokl buttery on 
boa'd lie cricyclc has a ringc of 20 
inilct> b:fuiv it needs icchirging but 
ii v.i4i) :.tiiy .1 &p4ic Uitieiy wli^li 
doubles its rai^c without ex^ccd.nj; 
the 6(1 Kilnp.ran veight l»yc<l down 
in itie rcgulniicns, 

^MthuuKh the C5 is built by 



Hooter >t M«rthyr Tydfi! in Sotnh 
Wales Sir Cli»c caM doubu tti 
rumcurs that i' is pcwcied by a 
louloi lliJl vrtjuld be mute u. Itu.ite .ii 
a donici.ic ippliuiice. He udiniiied 
that the eonpiny in Itay which 
builds :hc eiigtn: "<i<KS tnahe 
vrashmg machin: m.tton "but added 



mvHefioinly tha il "ilso miV.cv 
torpedo n»i0fs". 

Be tiiat IS it ma/ a periscojx would 
lie liut.dy ifyiiu intcjidcd Jiiviiiv ilie 
CA on bu;y road? since your head is 
only a; bonnet level, tht sttering is 
coniruUed by a crustibar uncer your 
thighs. 



Tramiel stares into infinity as 
X13 and 5T rangers see the light 



TkAMin. WANTS more W-mhI so the 
price o:' the 800XL is to be for red 
ilovn )et iKaiD to £99 ai part ci' a 
vvoildvwdc pria war, and meanwhile 
in I.as Vegjs Atari's combativ'; chiir- 
man stawtd the r.cw Atari Xli and 
ST ran{^es,ouilineo in Votir Ccmputer 
January, for tht first time. 

The XO is v,hat Atari is calling tlic 
8-bJt ransc dcvtlop:d fro-n th« 
800XL. The Etandard rcvon^ped 
80QXL will coji SI 20 in the United 
Stales with the 65 XLVi mmic ver- 
sion itKJorporaiiiit; a synthesiser at 
J1(t(} and tie 12Hk 1:0 XLi a! $200. 
The more txpeiisiw 6^ XEP forltblc 
incorporates a 5 inch m.ino;hrcmc 
screen and 3,5 inch ditc dive 

What rcillv impressed visitors to 
the Atari stard at the Las V^as 
Consumer Elceironics Sliuw vas the 
sofiu'ar» rii>mM«Tiar<>i1 on (hi? iwu- 
inacliinis — esptcially a pitckajie 
callid Infinity which incorporates 
wiiidovrs, 3 friendly llc\> f.iiivliuii 
and integrated spreadsheets, w.trd 
prorcssDf and relational dctabise. 

/^Ians n^w QL bathers baed on 
the 68C00 will start at 5500 vith the 
1 3CST whiih 1 as 128K, mjus;, ions 
and all which begins sjuni more 
like a Macintosh um\ a S ncliir, and 



iPflll III! I l|l| I 




goes up :o SJOO for the half-megabyte I UK is saying nothing yci about when 

f-20ST. Also sctiedulcd arc low aric^d | w: can cipcii ic sec these maciims 

S50K, and 500K drives with a 10 ' this side af the Atlantic or what the 

t 

Mcgibyle hi rd disc coning too Atari 1 pi ices wilt be. 



24 YOUR COIVPUTER. FEBRJARY 1985 



taws 



Personal Assistant is 
undercover BBC B 



Acorn* hop?.s td have >he first ofhs 
ABC computers, bavtd on u re 
inginccttd BBC-B in the shrps by 
ihi- trni ol' the month. 

Tliv rvui>jii.l A^Aikiaiu UA the 
hottoni af tic lannc niodd is called 

QL helps oul 
gardeners 

l*.\iRici\ Aurj TojY HodJ wmi lo 

tun> ihi Sinrlair QI frnn :i home 
compiiitr inio a garden conipuiisr. 

The Shrub Dato Bank and Planner 
is dcr.if^ed <o run tlQn2;.tidc lUc 
Arcl^ivc Jatu bisc and it will th-n 
jnsvcr querit'on; like "iJirub, 
fragrancy, hardy" lo describe wt.at 
you want then "complex ihadc, 
moist" to describe he lab.utl ii w-ill 
have to sur.'ivc iii. iixk -niU cone 
the I'olbwing suggestion; "Hldcr, 
Trivet, Skimni.a, Winter lacmirte 
and '.X'iserij," 

Tlic MoJds are keen consena- 

ltflni:t!i — uith t> h ttciy o;' wild lifi: 
rc&csrch in India ^-hv timv l:vc in 
Llangcitio Niiisenes. I.lingcithio, 
■"letMiiduii, Dyfsd, SY25 6QG .vhich 
i> where you shoulc scrd ymr £ 1 3 if 
)ou w.int ;i copy of the |)ragr;.tn on 
Miciodnve jaririd^c:s. 





w 




m\ 


« 


TOP 20 


Game 


Conpany 


MacMne 


■Alrnuii 


SIIU> 


ipee.futr 


■ Dooiy 


FiffDircl 


Spectriirr 


■8rur.ft L(« 


US Soltl 


08^64 


■ C0|Tl>3t 


tJorcil 


Spec'Uii) 


Lyn> 






■ Daley 


Ocean 


ipec'tiim 


Thompaofi 






Oecatlilcn 






■ Lllte 


Acwnsoft 


E.BC 


■ surckJi 


Oomnrk 


cewei 


■ "all Quy 


Elite 


Spftcirum 


■ 3II01!- 


Acthisirn 


C8Md4 


^ustor? 






■ Havoc 


Dyntvisioo 


CBMf>4 


■ Huncht>ack 


Ocean 


C8M64 


■ <nl(|hl Loro 


Ullimaie 


Epeclrum 


■ '.^rdsot 


Beyord 


Spectrum 


vlltjrignt 






■ ■»yjan^aia(rKi 


Mtkio Gen 


Spocirum 


■ RatdOvor 


US Gold 


Speoirtim 


Moscow 






■ Savags 


Afflus 


frfflfttlOn 


Pone 






■ "trNaNoe 


Garjoylf 


Sfientnim 


■ "tavsl wi.h 


Nev/ 


BBC 


'rashman 


3on«ration 




■ under- 


Uitinate 


Sooctrum 


wurtde 






■ ;axxon 


US Gold 


COM 34 



will be a packa^ of a n:w wyboaid 
eonluiniitt; u slimned down BBC und 
hi)ttt-in v'iei\' word procejsor and 
Vievi-sheel i^pr.'udi^heil on rom 
ugeilicr Willi ;i monwlromc s-.TCcn 
including a buil:-)n disc dive drive. 
The prioc is likclv to ht less than 
£UOC0. 

Th: icducct chip ooun- — 
Uecfon styl.* — will alwi be used in 
lie BBC wh.di will be able lo ofi'cr 
additional ftaiires or draiiatcatly 
diop io |>rit:<: u, a icvult. A .it^lK- 
Hoped Acorn spokesman wwild only 
ssy "that s one of the ways oi^nikii:]; 
it cheaper to prcducc". 

Price Cits "or ihc 3BC are coining 




.iii/ltow Mki u Uni Cluisiui'iis foi 
Acorn. Tlic company idmits that 



Electroii sales were "not n the same 
league as Conrmocorc or Sinclair," 



Schizoid Commodore shotgun 
blasts 64, 128 and CP/M targets 



■nii=\ CALL 1: "The Shotguu" - not 
b«.-,t«se of ilie war \vi h Atari but 
hecauM" :he CxmnxKtorc 128 hi:s 
llirw lur);i,*t ujdiinv«> :»ir.>uliineou.ily. 
I'irit ii ^san !in{X)nant new machine 
in ilscwr riglu with 128K Ki\S{ and 
yet anoih:r ixw, iitiprowd B.islc ".«. 
iiecond it car. cu; iis:lf in half — ilic 
sjwn-olf shotgun — lo mn all 
CommodDTc 61 Joftiare giv ng it 

Cambridge 
enough for 

Sir Ci. vv- s nucli publicised 

(.°>tri:«lntat punch ip wilh Chris 
Curr» of Accrn 'n the Baton of Beef 
pub .n Cambridge is ihm the only 
oam^le of an isolated cccu/reiKc bi 
the ci'inp jtcr industiy. 

The two mu li-raillionaires may 
have l>et.n intlucky to have been 
c:'tlg^t hiawlini; in pubUc after thc.r 
respective coiiuanies end of year 
pinks b'jt ami .ir fends have been 
rvnning tlscwhc.c. Accc-rdioi* to ore 

bruised ( o^ a g i n * r f I" « j; e c 

"Carabridgc" is more indiurc aixl 
civilised" than nr.o.«of tiie rest of tl-c 
iikIuXiv. 

L'p ii. the wi.d Nb-th-VPeii 
F reiton whch is supposed to te 
tinishing the megagimc 
Bmdersnatch — aiothcr Imagine 
refuRte hiS h^en luir^sscd bv the 
arrivi.1 of a whole stream of 
unsolicited goods and services 
irv-hiilinK a nihhith «tip, ''0 luc 
olinguishcrs 6 desks and a flood of 
jinik aiail. 

.\tcinwhile Sinclair is supposed to 
have "made ccntact again" with 
"icun" is \\t ca led his ex-empJoyce 
tl^ris Curry ^nd th: pair aic 
suppc-scd to be the best o" Irenes 
again Tile fracas happened on ilie 
Friday b.-forc Christmas vhen S:r 
Clive lashed out A-ith a ttirlcd copy of 
a magazine because In. was ingt>' 



:m insiini «»ftv:irr hnv — anr i)\vt\ ti 
c;ii» run (JIV.M usi.ig i Z-SO proctssoi 
in ;Klditioii to its fn(2 d-;rivjd S503 
procoior. 

■fhc 12S costs S2^0 and was ollci- 
all^ launcted at the Januaiy Con' 
sumcr I^lcciroaicsStuM* it Lu:i Vegas, 
bu with the exchange rate pum 
mcttinjt it is difliculi to predict thi 
British price when it .irnvcs in tht 

ain't big 
both of us 

about Acorn's "dishonest" 

rtd"criisinp. 

Tsacilionally St'icUir cjstcmcrs hi 
a -«imi ar situation htvc ust written 
to the Ad/ertisiBg Standard; 
Authority to complan that the 2f< 
days advert sed lias not been 
complied «viih — let's hope Sinclaii 
has not set i p cceden. fcr norc 



■.-arU- *«mmcr. fjcmiv.odcte i« »l(o 
launching an IBM PC lookaRke 
which may cveituiUy :on;e dawn lo 
livHi.e (.uiit|.uici piiccH und a [!i)iuil)le 
calltd tbc LCD. 

Match day 
for Amstrad 

Mah.ii oai' from Ocean is likely to 
;pread from tie Spejlruni to ihc 
Amitrad. Despite the pr:»bkms of 
programming on die .s|>uc(nun Jon 
KJtnan and Chris Clrrke have 
.produced li game v\hich lo'>ks almost 
is ^oi)d .If, Itueiiiaiioniil Soever on 
•.he Conmodor* 6< as well as giving 
js good a game. 

CK-e;in I'rjdurcr jon Woads claims 
,hai in some respects notably price — 
i'lM'i it is better. Also "on the 
r.ointnodorj gcine players can wilk 
"hrough ex'h other, an ourt they 
.'fln't " 



direct action tiy hii cititoner*. 

Poftable and poworfa'., firomer s TC-600 is the next development 
from theEP-44 with more co.ywKjni:a[ion& ability, nvire mamory and 
a simple buil'.-in wo'd processuir. 




YOUR COMPUTER, FEBRUARY 10S5 





































THOUGHTS &CR( 

37 MARKET STREET, HECKMONDWIKE, 


3SS 

WEST Y 


ES 

ORKJ 


1 










Telephone 0924-402337 


7CO 














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Orafl*^ a*rJ*Bt Rnft!«T Lwd 






EiKt'>'. urn 

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26 YOUR OOM^'UTER 


FEBRUARY 19 


85 



















I could 
do 



The problem (or 

■■Oecerrber's compe'Jtlon 
was to write a progfam 
Afnich played nougtits anc 

: crosses. StHI pursuing the 
theme of artificial 
ntelligence, we also 
suggested that you mi^ht 
ptvp itv? program the 
capacity tD learn from its 
Tiistakes. 

The winnir>g program — 
for the BEC — canie frorr 
S.O'Gfady. 29 Lndcn 
Gardens, Lorxion VV2. ii 
does not include a learning 
'acuity but then it does not 
!ieei1 lo — the prograrh 
never i^ses. Admittedly, 
manaQino to wir or draw 
every t.me at noughts and 
crosses is net d tflcult. 



m »•■ «•<» ■!> w 

f«. ji »Lk..t 'j«^«jvi«>(»v*);«',^f«iP**ji»» ->- ■* r* 

.I'll- 

,.«ir sv.^^*- 'f •*-*«• V<W> tV'HI'4'V (l-W *■•■ 

TtA- * •*<•***» i.»i»mii*ii ; 

- jr>i" NMWl«i*l 

r««t rn>i'« t ft 3 I' 



• ■**• i,>^,.%l,t.r,>.f.«- 



Wc were impress&d* 
however, by how short the 
program was. Il uses the 
avalualjon function 
dossribed tn David Lev/'s 
hook. Computer 
Samesmanshfp, This 
involves examining each 
(>ossibe move aid counting 
the number of noughts or 
crosses in each hoilzoital, 
diagonal, and veMical row. 

Line 230 then wo^ks out 
a score according to the 
formula: S«Ma*i2t^ - 
C2*63 -h N2*31 - C1*15 
+ N1*7. N3 contains the 
numbe^of rows of three 
noughts, C2 the number of 
rows of two crosRfifi, anri 
so on. The computer^ which 
is playing noughts, ma<es 
Iho move with t^e beat 
scoe. 

If yoj do not have a BBC 
yuij ylioufcl De aDie 10 
concert th-> p'ograrri fairly 
easily. MCD3 in line 50 
gives the temainder when a 
nunibe' hes ty then divided 
{continued on page 29) 





Starting out in home 

computing? First Bytes 

is tor you. Just write to 

Computer with any hardware or software 

problems, no matter how small or simple. 



High-level 
languages 

l.rtM ■uitMiii? J-ir&i lijics showed 
why op.Taing iysiEiiisarcJiea-ssiry: 
ihcy handle .ill tlie i^-tring hoisc- 
keeping fuActi^ns on a hiiciu, and 
>:Ln;ral.y kcca it lickinj; omt. 
■^h:nk^ to ihcii, :hc micro is your 
utKtlicci i\t\'K, iu» wailinj; for ynur 
coirmands. 

R K ti"> }{«.'t ycur Sfptcirum or 
Corimodor; 6-1 lo Icup [It rough 
hoo;>s you need some vr-jy oftdlinj it 
cxaiily whu to drt. Thii \<t wliciv 
Ivi^b-lcvcl lingjagr$ come in. 

■Picy arc.cal.cd JiiRh-levcl l-«cn isc 
hiiiDiui! cun utidcrsiard iheni, in.irc 
or less, und it is i wcll-knnvn I'act 
that wc arc hipjicr txrings. Lo*-lt:v'fl 
lunpiauvs jrc ibiiKS like maclvnc 
cottr lliJt unly freaks whs think in 
hoxidiH'itii:*! tan toiH- wiih 

A hifth-kvel langiisgc is s. ccm- 
puttr language that u>ks a scries of 
Miiicmcniri thit tool' a bii likw 
Unplish, aid whose rubs — ilie 
"syntax" of the Un^uagc — mitror 
(liutc uf everyday speech. In this way 
llic whole liusincM ofpriKramminc; 
l>eccime5; much mote siraij;htli3r\v»d. 

Tile nipst fanious hijih-lci'cl 
lancua^ is of roirse Hasic. Basic is 
so common cha: pc^pU tend ic fuiuei 
that it .s only one of many vays of 
talkint; lo yout micro. Not only iitc 
ihctc numcrou* other high-iei'cl 
lanpiaces, 3ut alsc- a who.c ringc of 
profrcsiive.y lower Itvels yon can 
iiileiitLl vviili a uiu^liilK. 

Hisic stands fo" B^girner's A!l- 
ptirxisf SvTiibolic Instruc:ion Code, 
and wa} defelofK-U 20 veais ago with 
(he sjiccifc aim o' creating a 
iaii^ua^ that vvs leasonablv close to 
EniElish, and henc.'; cniUI be tau;;hi 
to tieginneis. 

Il ii«irs simpi/ wnrHi; \\\tf If, Thin, 
Do, Goto, together with tl>c usual 
inathctT.atical operators like *■ ;nd 

. Each line ofthc prcgra.-)) cunliuiia 
one or more se.s of :ommands 
vvriiien using tictr. .After a program 
has hee.i w.-itten, it is then run. 

The jdea of 'unninc a progran: is 
something else we tend to itkc for 
i;ramcd, bti is a key inpredicnt in 
developing advanced and jHAverful 
jofiwarc. 

Some iiigh kvcl languages. 



IOLET/)=A+I0 







_> - 



i tcli-din^ Bibi^.'. allow you to enter a 
command rAhich is obeyed iniutcJi- 
atety. This is fnrc for very .s mj^le t-il- 
culation<, hui dies not let you move 
on to more coniplioiiee problems. 

In fact, progrimnint; !an;^jages do 
rot always have this immediate moic 
i4" eNecuioii. I'ar example fortran.. 
saort for l-ormjla Translarioi., can 
only run conirten* pmpram* after 
t.iey hate beer fully built up. In 
appeirar.ce its pro^rans k)ok very 
E.mibr :o met writttn .n 8a.t:c, 
vhich ii hardly iurprising sinre 
basic was partly based :>n it. 

TJcrc arc rrdno: dirTeicncvs of 
$y(K£,x, but i: is easy to move ac'oss if 
yt>u knew Base. I'orran is vised 
mainly for heavy nucnber-crunchinu 
applk:ati>ns in fciei ce and engineer- 
ing, and so is not ofi:ti .bund on 
niicTW>. 

.•\noihrr languag:: \\ tie Basic 
shtlilc is PistiJ, Miin>d jfrer the 
Frenrh mafhemattcian. It came ' 



about from iryirj; to design a lnj;h- 
tcvel Uogudg: tliii wvuld liavu ^1 ihe 
advantages n' Basic without some vi 
its less dcsirasie features Advantages 
included that it was easy to k:arn and 
iindersiand. Its kss ccsirablt femurcs 
included ilic drc-.dcd Basic Spar,hct;i 
Syndiome. 

Anyone who has w.-ititn Basic 
pTOf^nims knnu.'* ihc tcmpccrjor.. 
\X'hcn you f nd that yuur pros;ran 
does ioiiK-ihing unexpctcd, or has 
mi';-:eil <u t u jonicului c.»3c, or needs 
mixlilViiig, wu don't go away and 
write a whole ne^v program. Instead 
you add c Cioio or t^vo. 

This ot":en works wry wei.. I'nfor- 
tunatcly i: ca i leave .he ogio of your 
piogrim as tangUd as a ^lati; oicold 
spagh.-tti — her.ce iu narae. This 
mean; tlui when vol come to look at 
your progratT again b a few months' 
time, you cannot lot the life of you 
work ,>m how it is diMiij, what. 

(continued on (>age 29} 



YOUR COMPUTER. FEaRUARV 1985 27 




EIGHT NEW BOOKS FROM INTERFACE 

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dynamic, advanced , intelligent and fet ! 



The hitest books fiom interlace 
Piibl.ca'ions Lid arc determine:! ro 
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fingerlipii — 

For instance: 

If you're the dynaaiic type and 
you own an Amsiral, what < ould he 
beiUr lian our Idlest title 
"DYNAMIC GAMKS FOR TUF. 
AMSTRAD"? 

On ih(! other hf.nd, if your ;nind 
is far in atl varce of other i;aiihlJngi> 
. . . don't despair 

"ADVvANCED PROGrUMMING 
(ilJJI)K 1T)TI1E BBC MICRO ' and 
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But where do you turn if your 
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So don.t despair if DtPer book!> 
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.nteittiC* VuWcaitint aredht ibuied mt luti%'et>' inthi^ 'K ami Fir«>K VtliS (•R.int>u(cr». M J<i mV -foute Rtst ,<riFe«.l. LciccsLcr (053'J)5&'.l!)i(. 

KtfMir nrt^r^ h;inHi<^ Ky Inf ^rf:r^ fiiNltuilvnv Lttt 



28 YOUFCOIvlPUTER. FEBRUARY 1985 



(coniinved from paga 27} 

Pascal aims lo sop tIik slnrrv 
k.nd of progranining. Oue of iis 
iiicks is not lo ha\« 3 Goto «i all. 
Instead jfiu mii<a br."nk up /niir jirn- 
gram into neat anc logical smaller 
units [\iscal is :lso very stiict jbout 
siyjfi:; w!»<il kinc of vjriiblts ycu jrc 
worknp with — integer, real, and lo 
01 — And won't let you pluck ihcm 
OJT of :\\t air as m Mkk. 

Allin-all, Pascal is dus^ttHd lo 
cicoura.u: good clear progranmiirj; 
habili in a high level language. It is 
bjcoming avajia^le .in an i icreasirg 
number af hoivii n:icrcs. So i." yrii 
feci like a little discipline, it could be 
for you. 

Aojiiur lany^igc tharis ^cginnirg 
io appear is l-'orth. Thi; was origin- 
ally designed ic conlrtl the mov:- 
ment! of an astronomical tclcscop:. 
It is still niiiinly used leday for such 
onctol applicuions, cipccially 
things like robot unii!>. 

Like Basic, ;Hinh can respond 
immediately to a conmvand or to 
built-up prosrar.«. Ont of its moit 
pawcrfut fetturts Ls the ability lo 
C'eals riuw cnmmandR in the 
language as >>ou go along. VC^liereas in 
Basic you an: stuck with t.iosc that 

lltc desif. 1CI liuu^lu 111 .u stii.k in, ill 
Forth you usi. the fundan-cntil 
comniands to vritc ntw ones Tor 
your panicular neecs. 

One .slight ditad\antagc with the 
ItnpvaKc is the vv-siv in whicl vtu 
write out n:ath;mn(iica opera ions, 
Becajsc it was developed for 
specialist applir^iions, the Hc^gnfr 
idn'i worry io> nruch about little 
oddities. One ofihcsc it: the fuu thii 
y»u vac whoi i:i called K.;vcr»c I'olith 



I could 

do 
that 

(coM'tnued from page 27) 

by three; wh to DiV3 returns 
the number of limes tiree 
Uividei iulo ancttier 
number. X = 8 MCD3 
could, for example, be 
replaced 3y X = 8 - 
3*{IN7(8/3). You mty also 
need to replace the Proc 
statements by Gosubs. 

For this month's 
compotitlon the£15 pize 
will be awarded to the 
prcgrenn with the most 
inter«3ling bug or bugs. 
Quallt/ is more important 
than quantity here; we are 
looKmg for those 
maddeningly elusive bugs 
thai l<eepyoj ud hall :he 
night. The program shDuld 
not be more than 20 
statements l.ino, and 
should be accotnpanied by 
a note telling us what it is 
supposed to do 



Nctalian. 

lilVcctivcly rhis niems thai all ihc 
nvtmbcrs end t'un:tio;is are l>ur.il>c». 
loj:cth;r a: ore c.id of the line, anc 
all the operators that act on iheoi or 
iht Other. 'l*hc wa\ they inttracr 
together rcqviircs i ccrtaio amount of 
incinut uciobaiics 

If yoti wish to ictain the ability tc 
create your own functions anc 
operates -A'irhoiti having to jacr.fict 
all the legibility of Basic, you coule 
iry somcil.int; cal.ed \?L. 

Thii stands for simply A I'rogtani- 
niirjj; Lan^ua^c. Like Fonran it has : 
^ir.tnfi malhcmatical bias to i', and il 
is %'ery useful for ^^rilil^ one-lint 
programs thai carry out complex 
caUuUtiorj vciy .)ui<.klj'. 

One pro lien with nosi versions of 
AI'L is tliat they use a larK-" set of 
extra si);ds that nr.akc an Al'l 
program look like Ar.cicQI Egypliai: 
hierog yplics. 'I'lis also means that 
you rtally nc;d x special kfvboarc 
too. WhicA is a bit of a joke when 
you crnsidrr rhm snmr mir-o^ lilri» 
the Sfectiuin haven't even Kot an 
orcinary kiyboarc. 

Happily a veraioti h» icccntly 
bcin laur.chod for the QL that 
replaces all th^se syintxih by simple 
words. The comtlnailon of :hc Ql. 

Micros that 
can talk 

.Micros a.<u pretty wvndcrfui beasts, 
hut I bey Cut l>c liiiliei uii.)-M.s.tut. 
After ill, s}>endii)}; hours beat over i 
hoi keyboard asi Toiir cy«s go scfuar: 
Ironi siariog x\ the TV is hitdk cli-: 
bcu way of conimiinifating with 
your Icllcw .ncr. astd vonicn. Ya 
putcniiulh the nicro could be the 
cause of a com.iiurication revolu- 
tion. 

Anwnnc who his used a mdnt'iamc 
co,«p«tcr at i urivcisiiy or in c big 
firm linAva ihnt nuch time is jpcnl 
parsing niessigei from lerninil to 
leimiral. Mow wouldn't ,t be grtat if 
you could do ihai wrh yuur micros' 
All you need i.s a bit of Aire to con- 
ne.-| wu ap, except tha: really you 
wc-ul j iieid bits of wire from yru to 
everybody, and so would ihty. 

Rather conveniently, this network 
of wires up an;! cown the land 
alieady exists. It is call.-d ihc tele- 
phone. All yoii hive to do i: to find 
some »vay of geitinj; your compute: 
ro talk down it. The dcicc used to 
do this is called a incdein. 

An ibvious wa\' is to convert the 
si}!naU inside a micro into $o:ne <ind 
of auitblc sound. Th: te.ephone can 
ihrn ctrrj' this in the noimal waj', .*. 
niudeiri .ncc-rperatint; soniet.iine 
called an i^cotisiic couple: is jsed fo: 
this purpcsc. 

Thii iranKlai^K the Os and Is tha: 
go to make uo a computer program 
into tvo distinct frcejucnrics In this 
letpcci it is like Bas.cocc described 
in October's Firq Bytes. Ihcsc arc 
then fed dawn an ordinary telephone 
licaUsci by plugging it ;nto special 
rubber s-xkcts on the acoustic 
coupler. .Asiroihit accust:c cc-upler is 
used the other end to decode these 



BEGI 




aoH WH rrcitcs one of the n-ost 
povcrftil micro nutnbc engines 
around. 

All ilie luiiKiui^ej m> fai jotuidcrcd 
hav; bc;n geared towards the jroccs- 
sin^ of numbers. But another clasi of 
high-level lan»uagcs is conceracd 
with lists aid mlci. 

These arc lan?ua.;es that arc 
beg.nning to produce sij;niricant fro- 
?r«s in the trendy ficd of Aitiftcial 
InffHig^ni-^ Omi" th-at is available on 
several home micros it Lisp. 

I(> name comes from LlSt Proecs- 
Mn£, It works by .-naripu artiti^ I :ii3 
nf things rather than simple 
nuinbeis. L'sed prcpcr.y, i" can make 
dcdjatons from :ss(K'iatcd lists of 



infomation. Ar.othir lineuage iliat 
is used in this field is Prokg — Pro- 
gramming in Logic. A vcrs.on ;alled 
Mier's>Prjtoj: is ust staiting to coiuc 
throigh, and ofli;rs the same possi- 
bilities oi" trying out prcigramm.ng n 
.".I. 

Tltcrc arc many other high-level 
languages in use today, and they are 
s ill xirg vritt;n. As home nicriis 
get nore pcwcrt'ul and with bigger 
iiietiuric), w the run^- uf options 
increases. .\iem>ry is in important 
facto: becauie a lanj^uafc is just like 
any 3th«r j-roram in that it ncedt 
space to sto:e ii in orcier lo run \. 
For this reason many lorae 
v..>iit)juleis put ilieii Busies uii a Ruiii 
chip. This saves valuable space, and 
atlov^s the language to be usee wi:h 
the t'all Ram of the mschnc. 




two to.ics back into (he tiachinc 
readable bijiarr dibits. 

Although simple in theory and I"inc 
in ;'>rincipV.-, lhcr< arc one >r iwo 
verv ohviotis dill.cuhics wiih iliis 
method. First, if the headset m dis- 
turbed •vhi.c d»a \s \k\i\^ sent (livie 
is very likely to hi coirupiioo of the 
aui&o biceps and hcnoe the irforma- 
tior sent. 5:condly, the wliolc 
system of usin^ verj' last :hange> of 
frecuency — about 300 per second - 
is ftaught with similui daagcis. 

Fir safer is the direct connection 
modem. This allows yivi tn pinp 
your micro d.recily into the tele- 
phone jystcm. After the inodetn has 
doiie some diicrcjt prcparaiion of 
pro'rams to be sen:, they can then be 
downlotded d.rcctly. This is h.iih 
less likely t > sirfTcr from data corraj>- 
tion and pcteii iaily much fas.cr. 

There is the slight probicTi diat 
British Telecom .s undetsuuidably 
concerned abciit what you mi;ht 
sho/c down iis precbus iclet>hone 
lines in ilib way. Direct connection 



modems are iherifor; subject to 
pretty c.^sustive .scrutiny by the 
iJriiish Approvals Board for Tdc- 
corn.Tiunicaioni. 

It is illegal to connea a modem to 
the neiwoik ;hai has not bam 
appiovcd. Approved niodcU caii) a 
round green stirkeij nudels that are 
not approved must say so by carrying 
a trnngiilar red sticker. 

Kalurally, appro>ed modems cost 
more — the cheapest is about £100 
against £50 fur an unapproved 
model. Bur do not dc limptcd to cut 
ciirnt^rs. \V.' ppri«licT:illy trst? trip- 
phorc lines. 

Besides, there is no rea! point. A 
few years at,o, t modem vstiulil li^vc 
cost scwral hundred pounds at the 
cheapest . Today, the £100 barrier is 
being btcacned all the time to' most 
popular home micro model?, uud 
prices are itill dropping. Ycu can 
even get autodial modes fcr this sort 
of ixice. Ilicse ar;: rathe: civili.<)id 
devices that *iU evr.n dirl rh^ 
number for you. 



yOLR COMPU-ER. FEBRUARY 1385 29 



irock bottom ^'^ ^^2 

Whichever way you look at it. 
w='ve got the lowest prices, the 
w dest range and the bcc^ back up 
service in theccuntry. 
What yoLi won't get from js. a^e 
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guaranteed after-sales service. 



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5Qt;ps O bi-directioral O logic sfceking O 
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120 cps. Obi-directiornlU logic seRklng^ 
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availEblE, 



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want nur latest prices pleasR 

telephone 

Credit card fiot lire Q1-4821711 

Pleas= add £ 1 f n- delivery, we quarantee 48 
hoiir delivery fr^m payment 

Persona! callars welcome. W3're at the 
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B.OCpm Monday to Friday 1 C.OOam to 
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Export and dealer enquiries welcome. 
Post your order withchaque to 

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Unicom House. 
182 Royal College Street. 
London NV^/1 9\IN 
Telex 295 931 UniconG 



THE 



TOP 



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BETA BASIC 1.8 

ENHANCED BASIC FOR SPECTRUM 48K 

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- DATA HAnDUAIG 

R«ieas» 1-8 is •nort powo/ful th*n e»erl Wi; rfun'i have spece :o da th»i program 
iUitiCe — if YOU tjtn't h«i(AX/# th# j»rt. <«miJ iv : torgs S.A.C. Ut firthcf 

in'oiTTOiion. 

Features: Contnanls irti 9n||Tv entry kev^^onJs in gfoptiics moJe. Syriiix h 
Ct-cckid on eriTiy. Fully noittwiiiiiy with Spectrum Baste. Vlicr^drive cmnpnittflc- 
Cftfnpfehensive inaauai. 
NOTC: Rolvase 1.0 t« sill avatlullo fa 1&48K Sp«cirtm a: tl 1.00, 



WWM COMtta CKlCf tf*w 
M>-^^ t*h«^ Wfph i 4>K»H 
to XIV tt*> «**1AI» ««Ti 
OOCTC *.*aIi >« ^o. 
OOiCXir«»v<Ui« 

torn T*«cM4 'M 

till tetwl «•C^ ■ T 4tNl 






rt If*-*; ■«*+.* »-<• »*nrn«<iltJ i-i" 



JOil TKW :»!»#« nn« 
KtVMfOflCt rtrwinywtwti v*o» 

(wci mv 7TAt 4rV4 OIPO^I 

fwoo. Off pwo*. (Norn^o 

FUMCTIONS 

M<» in«tf J«t 



lCMV*i nriLi&(ii *n^.jtrhi«> 
4011 <t Cr »:i1 or i^e-n' h OTf 

ICWHl >ih« P01.1.. iji Mtr4ui Mco 

W>«LCu4i4 ••tf' Q«c LOOP 
<IW5. *fl!S i*^vr HOT n't^n 
Wd. tAQ «iiiiii*uti f\OT »i4ii 



litiC lilt ar* 

lTim44 ff0t4tl nlinijt 

IMC I f>r«t rf^ am* 
JVHC* 'miTKlB ruiha't 



OtJy f 11.70 hcluiivp* (Upgrade price 'Of RetOdS^ *.0 own#is i:: r4 00, This 
m:liide2£ a 12 t^aqp supDlem^nt io ytor fTonuJl. Pteost quote date ol ()iirc»i,Tio. H 
V*uct»*J tyoi fiiiK:tto:<? from U9. »tai« iupplrcr and return original casietlt:.} 



PIcowsiToJmt: 

Bcu^ Bvsic Rofcdso 1,8 PA\m«rt of £1 1.00 s cnalosid. 

itr (.11. 5C lor IcKcign crd^fs). Cheques CAy:iMo to OCFASOFT, 

I don'l tHth^ve ilt Pr«a»i;sert4 truj full ^Oto U o' Ecii 6«iic 1.8. lervcloso I Stamped 



NAMG: . . 
ADOmSS 



BETASOFT 

92 OXFORD ROAD, MOSELEY, 

BIRMIMGHAM B13 9SQ. 



Its easy to 
complain about 
advertisements. 
But which ones? 



Every wi'ek niilliotis :)f acvertisoments 
appear in prinr,:)n posters or in the c;ncma. 

Most of rliotn cnniply with the nilcs 
ccinaJned in the Bntidi Gxie oi Adverrisiug 
Pnictice. 

But some of them break the mles and 
wanatK yuui ct-niplainis. 

It yixi re not sure about wh:t:li ones they 
are. Knvevcr. drop us a liiv and we'll .send y>u 
an abridgixi copy of the AdveiTis ng Gxi.:. 

Then, if an advertisement bothers 
y(Ki. you'll be justified in bothering us. 



• 



The Advcrti.sini; Standard.<s Authority. 
If an advertisement is wTong,were here to put it right. 

ASA I.:.! r.'pt.' K-.Nvt ll....u.<Tinii>otonl>!,i,.-. t.,t„,,iO.V(.'lL'liN' 



Tlii> «i\uv i> Jt!ii.iti\l ii> tin- inr.TV'.i.'. i it iufh sandnas oj ajwrtlsmi 



30 YOUR COMPUTER, FEBRUARV 1985 



If you have 
anything of 
interest to tell us 
about your 
computer club 
why not contact 
us on 
01-661 3144. 

Local 
news 

Irvine 

You can nna\e contact w th 
the Irvine hackers via Ev/an 
Dalton. 21 Bern/ Dive, 
irv ne, Ayrsnire kai2 JLG 
or telephone 0294 76£7. 
Membership costs £2 

Whitehaven 

The West Cymbria User 
Group serves the 
Whiteiaven and W3rking:on 
area. Activities mc ude 
open evenings, computer 
courses and wcrkiriQ on 
various projects — 
Including spsech synthesis, 
dicitistno or^P^^''^^ *'f^f^ ^ 
lightpen. Ring P Majid on 
0946-62732 or K Purkiss on 
0046 66586. 

Gravesend 

The G'aveseid Computer 
Ckb row hangs out at the 
Council Tenants Club, 
Whitehill Lane, Sravesend, 
Kent. They mee: every 
Thgrodoy evening. Contact 
The Club Secretary. 58 
Apsledene, Hever Farn 
Estate, singieweli, 
Gravesend, Ken; DA12 SEE. 

Colwyn 

Colwyi Computer Club 

mcsto ot Ihe Crsens I lotel, 

ColwyT Bay. Co^tact 

D Eevan, c/o Abergele Road, 

Co^wy.^ Bay, Ciwyd Luy 

7PA. 



COMPUTER 



Paul Bond takes a trip to 
the banks of the Thames 
to discover what the 
besieged GLC is doing 
micro-v\/ise. 



H) hi; (IK NOT to be? Shates peart may 
not have ha J thf Greater l^xlon 
Cjuti.il m iiiiihI when hc ptiitied 
these immortal word> — bu- there s 
iiK'vitjbly an cletneni of doubt vlien- 
e\er oiw vvtites about a bocy linkat 
w.th the Gl.<;, NubjcT ai it is tosudi 
a A'ithcrir.^ on»lam>hi from the ctniral 
Kwcr.iincnt. 

I>3vid Kimpion pu: it this •vay with 
ti.i;«r<l lo the GI.C (^mput<r 
Workiihop. of which he i$ heud: "No- 
01 « has tried to identify iiirKiiors 
wiicl) kIiuuU tMi Luti iiiu:". The 
(uiicti.>i)^ ;irc c.Toinly nijny an:i 
v;ricd The fimons Root) 97 il is 
ntw just :allfd ihc Coii^utcr \vort.- 
slwp — provides a ch-incc Icr people 
10 try ou: varioLS typo of pcnonjl 
(.■otnputcr. It ii ocrasionally booktd by 
I.ondoii-bucc compiKcr clubi like ilie 
.'Vssoc.aCJCNi of I .mi(l<«i rVimpinrr 
Clubs, B/.SUG, and the Indtpciidei.t 
Commodore Preduf.s Usui Groin 
(ICl't'G) but it nbo provider 

scmimrs and workshop!, for wluntar/ 
or;anisaiiuns> cjmnun.iy i;roupi, 
Hides iriions, coopcraiivo ami 
prsfesjioiul a>soduiicns. 

The prciniyes opcrcd in Fcl>iuar/ 
1962, and \tr Kiiiipion's job van 
or;gJnjHy to loo< after infornution 
tethnclofif QT — iviiumber that:) 
anJ (he GLC. They kirkcd off Iw 
scndini: out a sur\'ey via the London 
V<.luii.:iry S«vi« Coutidl which hov 
.1 list of lb: 5,500 volantiry or^anisa- 
tioos n the (aptial. ?in« then thev 
h.i.'c .>«iU uy ei|ui)xiiciii, txptrtUC 
and iiicre-«ed siaiT rctource^ lo 10. 

Organbiiiions v^hic'i have received 
hep inclLde Age 0>nc-:rn Greaic 
Lcndcn, British Sports Associiiioo 
(bi th: Disabled, tlit National Ja« 
Cenin, the L.>nd:)n Union cf Yjuih 
(^,!ibs, and varicus Family Seivice 
Units. In tbr l»sr siv rnnnih* tlicy lavt 
held *iii seminars, advised -over 100 
individuals and dcali with over 200 








u 



tlelegaies from disiblod oigaitts;it:ons 
These inciitdt cooperatives like ilie 
Cclleciive Design atiJ Building Co- 
op';rath'c and the Half.Mcon Theatre 
Systems advisee, or. includ: every- 
thins from dBise il on a Tckvideo — 
as used by th; Aletitul Health 
FouiidHion to build up a dirtciory of 
c-jting a^encitt — down to (lie Ics: 
reclierche iiBC Micro used bv I'l.AT 
(F:cilit>' fnr l.ivny; & Asse^Miietit 
Tiiueilier). Y\J>CY is a small rctjistsrcd 
chanty set up to provide training in 
setf-hclj) skilU ftr mentally lundi- 
capped people in th; l.uiKlon 
Borough cf Soutlnvark. The BHL; is 
u-sid i.s an utminislrative lool for 
budgeliiig and ois'i-iU'W :nal\sis, and 
providng tr;iniii5 sheets .-ach 

l-'LAT iraliiiM \vA\ a plunacd trtiiiin^ 
schedule — ard mail. It is envisaged 
tha the :on-puter Ailt ei."ntvia!ly 

lM.'<.v>ni< a irjiniit:' .yvl i»iif; bubiL 

edttcitiona gamcj. •■* BUG with a 
daiabaie Rom is also being jscd by 
tJiiiiy /u, an argcimatior lot handi- 
capped children. 

The GI.C Cotnputer Workshop 
do<sn't jusi p.'oviJc help for caring 
aKcncici — for exrmpc, some advice 
has fM>*n 2"vci> lo Fanratv l-'jK-iorv 



Video, 1 ncn-ptofii maikinf; organisu- 
ion which is cotnpitin}; u database list 
')i -iX cNisting cnmnieri.ial tnd cduca- 
ion.il vidco:apes. The W<irk«:h-tp ako 
iiaintuins ronraci with <:"oups like 
Vlic'osistcr ard Central London 
vVomeii & Coir.puting whirh provide 
resources for women using 
computers. The bttci otgaiiisation 
ijii ;k: (.iititacted or 01 'HC 0112. 

During the suituner he Wo'kshop 
developed a Br^iille word processor at 
considerably less cent ihan the £^,(;(H) 
ihai existing; special iseil svslcms can 
cost. This was doie hv the sim:>le 
c.\poJienl cf ptacing a h i;h-.]uality 
racing bicy.'le inner tube orer Ihc 
priiTiT cillrr Rr'.itllu it all hiKcd on 
&ix dots arranged in pairs like ihe iix 
on a dioefuce. 'I'hcie arc printed out 
by ihc full stop, 

T'he GI.C haj pia /.!0,()00 iolo the 
London Festival of Ccimjvitin.: held 
.■\prll V-.JI, :ntl iop;s lliai tins will go 
towards inikiif; riorj Londoners 
; waiv of what ihey tati achicvr w th 
computers. More inlbimutiun abc-ur 
tile GIXj C^ompuier NX'orkshop is 
cvailihle by phoniiij; Ol-ftV'l «<»'? 
KiKiuiries about the London Kstival 
<.S Computing should be eirected to 
BIPR on 01 -IV. 2M7. 



Central London Women & Ccmf.uling's Rachel Sarger using 
o.ie of the sixApnccts 'ha' ClW:C have for tr3in:ng purposes 
They are fuitdtaJ by tUe GLC. 




Las! yen( tte GLC r<jn a comoetilion for a computer gane 
conde,vn.ng racism. Here Ken Livingstone is seen zappina away 
with oie of (he wirners. 



rOLiR COMPU'Ea FEBRUAFY 1985 31 



■:-M^ 



■ "?^r. 



m 






V %: ^ 



.>-:..; 




I 



ou know that 



,' I . }K<Af «>l.-'>iy '.•:.! M^: 




M^MWIll^mif^fifitim 



almost 80% of bushess micros are sold through dealers 

only Micro Business magazine readies those dealers 

it you're launching a new product, it can be advertised on the front cover of Micro Business 

So if Micro Business isn't on your media schedule yet, call Ken Walford on 01-651 3139, today. 



M 



I 



iii(MaM»'^'^'^-"^^-'^^-^^^^ I Ml fill i1 



ADD-ON 

Opus 

Disc System 
Sfjearum 
£199.95 

Opus hav/e reloacsd a cicc 
systen for tfe Speclium 
whic^ they claim is totally 
compalillu with Uik Micro- 
drive operat ng system. This 
means ihai any program 
wricf" runs on a Miciodrive 
v^iil run en an Opus s/stem. 
at a rruch higher speed. The 
Spectrum sits on lop of the 
metal interface and can be 

srrfi'wfti into it, liko 
Interface 1. 

Apart from the Shugart 
dire jooket there la a bi- 
dinectional centroiics type 
printer prjrl and a continu- 
ation o( me expansion t>us. 
Th3 full range of Opus 
drives, three or S'A inch can 
be used. The system comes 
with a utility disc anc a 
manual. 

The manual is perhaps its 
on;y major failure as it 
rat^&r a^eumoc you know 
how '.o use a Microdrive. 
Still, yoL can alv/ays buy 
one o' ths man/ "diivt; your 
Microdrive-" f}ooks. It 
represents excellent vaue 
at tiyy.yj tor the complete 
system and s avallaole 
froTfi Opus OT 01-701 8668 or 
from larger tranches of 
Boots 

Euromax 

Joystick Interface 

-t-4 ard C16 

£4.45 

Thio to useful add-on for 

C16 and -t-4 owne's, giving 
them access to the huge 
range rat Ataii-type joysticks 
available. This includes 
Euromax'5 own range. 

Interpress 

Cct^sa'.it! Storage 

£6.00 

The Boneco Audio Casse'.te 

Safe can store up o 10 

:;assettes in a sliding draw. 

Several draws can hf. 

slipped together. The 

cassettes a'e stored 

verlicdiy. 

Euroelectronlcs 

Printer tnierface 
Spectrum 
^34.35 t cable 

-or those tucky enough to 
lave one of he ne// colour 
printers, this inte'face 
allows full colour or four 
r:nlnur .Eir.rAen djmps. 



HAR 



AMX 
mouse 



3BC 

Advanced Memay Sys'.en^s 

£69.95 

By iNrRODirc.iNO p;sn-over 
vvindow3, koiu and, tno$i impor:- 
.intly, I niDust, Appb's Miirini'Ash 
ilmost jtlows \ou :o typa^s I tie kcy- 
SxvuU xa a means of opcraimg the 
:on"piUfr. Whfn i: appca."cd }>ecj)lc 
p:i:ilic(ul lliul t; .votld >nly Ix :t 
nwtcr oi ;iini- ijclcrc the sane 
rtuiurgs appcir.'d un an 8-bit mitro. 
Island l.oek kicked ofl" by using 
wiiiiaw% a:id tcom in it( c>:cclk:m 
mufic froRraiii. And now .'\dvat>:cd 
Vicm^ry Sjr.tcins iia;. [.'o:iu»,n>t btttcr 
?y ;.ddin>; a mc-usc to the BKC, 

A sensitive joystick 

Un its own itic iiiDUic is not nuich 
nivr.' ihjn a vcty »iisitivc uvMitkiit 
3n iipsiik dc w)! iiatkba I, scalcc doA-n 
lo 111 sHUfily into \ht palni o'tht hand. 
)t onnrciM tnia tlw u.M:r jwi ani 
accd.<> J \\in !>tirlac«; on whxih to toll 
;iruund. Wk-it gives it its pc.wei i^ ilii; 
ucompoiiyjng swftwarc 

The AAIX aimiit- comes niilj i 
Rosii ;*nd sccral progrnstts on <tk'<:,iiii> 
or Jisc I'hc Rom prt-vid.-s 15 
comiiand?; ^'Itirh cm be tncUiJcd in 

grants. Toptthcr thcj' alow you to asc 
ihc mcuse lo «.ut)lrol pointers. 
wiiKuvvi aivl Ictn^. 

Icons are built in 

Siriy four picdctinei icotw, t-.ch 
mad: up of four daracicrs, ar« buih 
Into the Koii. 'Icon plac* 'Iw 'ton 
fi' your ;ho.ce '>.Ik:c >i)U 'van it on 
llic scran. Aliernatiwiy vou <:an 
:>5><cign a panicutar .con to act as ihc 
iiioitic pointci. Th«n M-ith llic 
COmman I * Vtovriv.'mtrr yuu cjn use 
tnc mouvc lo move the icor around. 

Anonj, ihc othc <;oniin:iivil& arc 




'W'irdov which draw; a win<)iv,v 
with a Itorder snd 'BiitK-n ivhi<h 
defines tlse kty cwies Rcnerated by the 
t^rve bultoiK at (tie froru of il^ 
tryus;. As the rott'mands arc only 
avnilalik- m the BBC $ hi<l><tes nono- 
eliiymi: modes, .mrt -1, ' l')(sk is 
ItindT sir.ce it cituts the >cr<ji:n with .1 





T:>H- 



ff V7 



III IJIWI ,l,,i. 



■-- >fc • * « « « iia 

— - - * * * r 4 

-r • « « * ♦ » 4 

— — • « « « 4 « « 4 




ft-::; 






I 



.l«*iMMlMh.^«BA«tM««fr 







urcy patwrn of tltcrnatc white and 
bU\;k Jou. 

Jo<ti twv i?rt<»etjvi;l7 tltOTc routin>» 
wurk with the mouse is well 
detnorriiraied by :he .'Vriv/t-rkX 
|ji«>);u'iii. li i3i.k>.ily iiuidellcU un ih<r 
Apple s A'.acdraw program. .^]lliou};h 
it is no! a; pywertul it must be one ol' 
ih« nio'vi iniprejsivc diawbii; pro- 
griiiis yet M ;ippcjr o:'. a hotce micro, 

To start otfi'ou are p.'cjetucd with a 
bbiik icre;n bord.rcd by a number oi" 
biwtes v^-hict show tlw opiiotw 
nvaiiiihio Fisbl icor.s at the righi 
represent luch fae litics as a spray can, 
a fcnc.l, a rubber, and a piini roller. H" 
yoJ wane to ise llic iijiay (.an, you 
move the nioiKc (:oitiier ever the icon 
ami hit;hliijht it b/ pa-ssii^ i butoa 

Now ycu cjn ciuKse :i ipray ."iizt 
and, Irom a tange of 24 pa:terns, a 
spray texture or "colojr", The maasc 
pouter clun.i;«s into a spray can and 
by sireply rolling the luuiibe ariund 
youf desk rnp yni r;in r'ri*;>tr' ihc-sor. 
of cflfe^rt favoured by sub'A'ay gr;ijrin; 
artists. 

A window pops up 

%'hcn you highlij?hi nnr or' the 
heidiiigs alonj; tht tof a window pot*i 
up giving a further r.injjc ol opiiom 
such 3& (luinpinf; the (crccn to a 
printei or inclutling text in the 
piatire. The mouse .naltes tW these 
futiliiicN csteniortiUy cas/ to use. 

A staidard leproach levelled against 
drswirtg p.'ogmms is that they do nol 
improve on (wnul and paper. An- 
workX — in conjurction with thi 
nifltise — s one iMumam tha' reliitet 
thii cimrgt. Indeed this reviewer was 
h.impe-cd by tequests to play with it 
froii p>.-opJc- who normal y jiv* 
corapuiers a wide berih. 



YOUR COMPJTER. FEBRUARY 1985 33 



The original and still 
the leader in value. 



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measures 

6V4" X SVa" n 

X 61/2' 




Our Qualit y Promise 



You can order MiSSS disks with confidence. We buy 
ourd.sk? in bulk from international m:)nufaclurcrs,to 
our spccificttioas, then test , grade and retcst them in our 
London .aboraiories. Kvcry order of 25 or 50 comes 
park^rt in rhp <;rm*' top n)inli:y rip,ic plastic storage box. 
ourMEGAvBOX. With four dividers. EvcryoidcroflO 
conie; packed ii] our dISCO-bOX librar>' :asc. 



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give cair fair.ous 'two for one' guarantee. II yen i'lnd a 
faulty disk, return it to us, and we'll send you two in 
exchange immediately. All part ol our live year guarantee. 




-it's tough! 



XISSS 



51/4" Floppy 
Disks Prices 



Code } 25 s^'ddXlUSS ^ '/V48U1 disks witli 

MmOfM in MEGA«BOX £29 
tjcde4 25di-dd/|frW?i'/'«'48tpidiskiwni) 

/ISmOfW in MEGA*BOX L'39 
Coilc 5 SO s.vdd XLS2S "■ 'V^^^tr-i di^kj wiih 

MfOlM' in MEOAABOX £50 
Code6 SO<k>d<iXlUSS Si/VtSipidisktwiih 

MKOff/F in MEGA'BOX £75 
Code 1 ] si'di ti\[S}l ' ''4-1 St pi d sks with 

.«»WOr^ in disco-box £13 
Co.ic 2 10ds.'dd/||QW? 5'/V' 48ipi disks witi 

MmmFm dfscobox £18 

Features: Write protici notch, centre hubs, double 

and single de.isit't'. 

Tn'o:*' sieevjs, f.nd with MSHM^ff^, 



Personal Callers Very 
Welcome 

We're r.ow -siubliyicdin our newshcwroom in 
Alfred Plac:. You can >ave ou." JtZ.OO Jcliver,- 
ehaiRC bv cillins in - von'll be wclconc from 
IO.OOa.m.iill5.00p.n.S;iturdavtO.OOi.m.- 
4.0(1 p.m. 



Help Lines 



If you vrani help or informaticn to place an order 
nng ou.-- 'hu[ line' en Ul •*>> 1 3600or if yon need 
ecf nicil advia:ring01-6}l 025S. 

Official Orders 

We accept orders froir allgovjmmcni txtdici, 
schools, universities, libri^ries, armed foicesetc. 
Wedespatch o.n receipt of an official purchase 
irder. If you can't rais; a chccuc xithoui an 
in voice i usi puu 01 icleplwue your order and we 11 
>en<t you a proforma by rclum. 



NEW! 

The midi box 



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15 ds-'dd di.sk.i in our mlCif-bOXat a 

bargain price. 

Our new midlbOX hts some great 

features. It's made ofhigh impact PVC 

aiid holds up to 30 f V-?' disks, but is 

one of ihc nculcst on the market. 

Measuring 6 '/(' x 6 'A' x .? W the ridged 

lid convctiictiUy holds the disks you arc 

workjjng on ready to hand. And with 1 5 

ds.'dd disks with /mm/F it's a 
baijjaiii at uuly £20 p. us v a 1 . Code M 1 . 

A Box and a half for the 
price of one! 




Special. Midiboxwith 

80 track 96 tpi disks at only £25 plus vat. 

CodeM2 



Disco Te k Ltd., Lex House, 3-6 \tfrcd Place, London WCl , England. I'elephone !>ales: 01-631 3600 Technical Enquiries: 01-631 0255 



Fill in the coupon or send written orders. 

Name 

Signature 

Ad dress 



Disco Tek Ltd., LcxHousc, 3-6 Alfred Place, London WCi, England. 
Please send nic the following: 



I enclose a cheque for£- 



.Posltode. 



or debit 



mv Access/Diner card number 



C KfiZ7 is a rcgiitcrcd nanc i; a registered ramcof 
XLTRONT.td. 



Code No. 


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Y^ VAT at 15% 
Add£2.00deliveryfordisks,£5.00fordrives j k^ Delivery 
or £6.00 for both. Cleaning kits free delivery. ' *^ j^,,^, 









V-. 



StarK 
chart 



Blue Max 

CBM-64 
£8.95 

Shcot-emup 
U.S Gold 

• • • 

Blue Max flies again — bU 
this timfl with Commocore 
markings. Wi'.h }:s 
impresaive graphics, this 
U.S. impoft firot appeared 
in Eritain 'or the Atari sofne 
14 (norths ago. 'he screen 
Uispltty mid buui U cie not 
as good as the Atari's. 

You have to strafe and 
bomb ground targets — 
bridges, factories, boats, 
and artillery batteries — 
and shoot down enemy 
aircraft. 

Although Itie sptling is 
World War t, you are flying 
for the RAF at a time when 
only the nrC existed and 
are pitted against the Axis 
powers of the 1S30s. 

Yet those academic 
objections don't delract 
from what Is a very good 
game. 

New Cylon 
Attack 

Spectium 48K 
£5.75 

A'n'F Software 

• • 

In isometric perspective — 
3-D to you, n-ate. This is 
what il says on the Inlay, 
out I'n^ net convinc5d. No 
swopping through coemoe 
like Codename MA~ 

You just stooge abojt 
left and right, up and down, 
peppering the oncomirg 
tiordes with laser boits. Not 
\i6ty colourful, not very 3-D. 

Zone 00 

Spectrum 48K 

Btcw-'em-up 

Allanson 

• • 

One of these games where 
yOLj hSfjR In dod^A arniind 
planting one bomb at a 
tinne to destroy /our 
accailants. These inoludc 
octopi chasing you rotnd 
shipwrecl^s that look like 
Blue Petet badyus, ciiid 
later on yallcw submarines 
and blue meanies. 



SOFT 



QL Chess 

■ Sinclair Ql 

■ Psion/Sinclair 
U Board garro 
U £19.95 

• * • • • 

.*^s KLarpov and Kasparov, loc to .oe 
jndsr a chcjsbcard, 'wert still 
siog^in^ it vui in wnai «as to b«co:nc 
■he longcst-tvei wcrld champbnship 
nnuicli, Puio.i wis p:ej>aring iu woild- 
seating chess progtatn for the 
commercial arena. 

Allhou^l) ihi Pson prcgram voa 
running on a SMHz Sage computer 
who) it lied for firs: place in the 1984 
World Microcomputer Champion- 
ihip, its pcr:brraanec on iheQL is <till 
vcr>- impressive. Iti stringihs lie a lot 
deeper than the noveliy of the 
progrant's iiree-dimenuoiul graph.cs. 

Y:>u should be able tu finJ a levc of 
ploy from one of \4 th£t will give you 
a good ;anic, Thoic H levels can b« 
doubled to 28 viih rhe js« of The Euy 
conr.maDil — which put> the QL at the 
disadvantage of not being able tj tliink 
abujl iu iiiuve wliiic yuu u.c lliinkiiig 
abojt puri. 

If yot rcflly wan: an easy ga.'ne, try 
the novice tevcl U. Theconipu.er will 
benignly play wcikly w.ientvcr it 
looks like beati.ig you. Of coiusc that 
Icind of help my not appeal, so the 
human can choose a response time 
frftm thp QT. \jhirh nn viry from » 
few seconds at the lower ItveU up to 
level l^s equal lime — it averages out 

Dungeons 
of Ba 

■ CBM-fkl 

■ Arcade adventure 

■ Qwcksilva 

■ £12.95 

ir ir -k 

Khcovrr the fabled sionc of Ba 
before youi energy rurs out. This is a 
maze game witi a diflfacncc. Norman 
the wurior has to fight Ws way 
through luni.els, pressing se^rret 
parebt in the ccrricoTS to rc/cal 
hidden chambfrs with objecs to help 
hint in his quest. This is an arcade 
adventure which givecyou the kind of 
scc.ion through th; earth ;fievr of the 
action best exemplified by 3ig-Du| — 
exu:pi liiBi iliac b iiu dig^iii^. 

I wo'jldn't go so fai as to describe 
the graphics as spectacular — this is 
how they aic dcscril>cd on the 
packaging — but nevenheless you are 
confronted widi a fair ranje cf w;ird 
and vonderful opponents from 
scorpions to issorted bower bjys, 
pr«iirrahly rhp fTiijrclijns nf the 

Stone. Yot can steer jourself around 
the maze with the aid of a joystick plus 
ihc fur-clion keys hav: been rcdcaig 




l!ic l:mc yot arc taking to move and 
l.iCi) nutcho yoji jdce. 

Fo.' a fame of rorrespondence chess 
length, level 13 gives the computer in 
intinitc time to cjnsider its mov;, and 
will only make up its mind w\\a\ you 
fsrce it :o tsin^ th* M, move now, 
key. Fom of chess pjzzl» uill iovo jr 
nc Psion program's problem solving 
ability. It his ei;ht levels. 

\l/^ai things arc getting dci^icritc 
you can isk she computer to suggest a 



mav^ "rtr ymi or, fiiiling riar, yoii nm 
latc back the moves until you ruach 
the pOint whcie you blundered. If you 
actually rranagc V> inflict « (icfciSl on 
the siicon oppoiitioa yju can call 
round fri:ndi and neighbours and 
bore ihera w.th a fiill-tengn action 
replay of youi triumph. 

But apa.'i from playing a quality of 
chiss nev:r before seen on a borne 
co:npuicT, what makes this program 
immediately attr:tctive is the astonish- 
ingly .'ugl. quality of ita graphia. 
Tcby Wolpe. 




noted £o thai you can put up a thield, 
or fire in irroA-, .'ighi, or take an 
object. You simply punch the appio- 
piiul' key btfuic ywj squtXiC l!.c fiic- 
button. 

Shields ire nc:cssary because 
trroivs will iudiicnly zcom down the 
torridon at Nariran, thcugh ^y 
don', setra to be much use against the 
denizens of Jic maz:. If you do enter 
into fiscinifli with any cf these beings 

the C-M anila a realiiiic ihumpLlg 

and whjnp:rin| sound. With each 
contact your experience ratirsg 
mcruiso and your energy Itvcl drops. 



Vou can pick up thingi in the nio«r 
uncxpcatd p.acct. Il is worth search- 
ing the apparently cnpty rooms 
which sometimes iipp,;jir at adfunccs to 
the maze because you nay discover 
food ind drir.k, nore arrows, or even 
a vial of unknown. This can make you 
dp around the nvize at teirifx; spcedi, 
or no: do very much for you at all. 

There arc unexpected pitfalls and 
tdcpcrt traps which cause you :o te 
pitched in w:th 'he most unpleasar.t 
compmy, the ujual ihimping and 
squea.ing resulting. All this kind cf 
(continued on page 3?) 



YOUR COMPUTPR, FFRRUAR/ 1985 3B 




notes all at the sane time). 

At the press of a bu:tcn, 
you car summon up pre- 
programmed rhythms and bass 
accompaniments to pla^ along to. 
^H These three rhythm 
combinations can be speeded 
up or slowed down. 
■■I You can aven glissando (so 
long OS you don't hurt yourself.] 

Tha: is, make a note slide 
up ir pitch. 

^H You can filter sound: reduce 
th3 treDle. tne bass, or both. You 
can save, on cassette or disk, 
a voice or tune for Future use. 
IHI And, for be.ter sound 
reproduction, ycu can connect 



MAKE MUSIC 
YOUR 




^H Alright, let's al gather 
round the computer for a good 
old sing-song, 

P^T You'll find the oew 
Commodore 64 Music Makar 
strikes exactly the hgh: note, 
whether you're an accomplished 

musician on ^^ commodore 

whether yoj ^i coMPUTEn software 



then tap in the rhythm. 
^■lAnd, before you can even 
say '=?ichord Cloydcrmon! the 
cutonatic playback fills the 
room with music. 
I^H Orce you've become a 
piano '/irtuDSO, you'll quickly 
opprcciate the 
Music Maker's 



are an oit-and-out beginner. 

^H If you can hum and knew 

ycur ABC. you can start to 

play 'amous pcpular tunes 

immediately. 

^■1 No matter it yDu ve never 

played a no:e before. 

WK Simply type in the notes 

from the SFX "uton Handbook, 

^^ MUSIC MAKER DISK OR CASSETTE £29.95 



ether amazing Dapabilities. 

You car synthesize musical 
instrLmen:s. even create your 
own 'cynth' electronic sounds 
■■ Yoj can play notes 
polyphonically. 
I^H This is the sma^t 
way of saying you can 
ptay three different 



Mus c Maker to vour hi-fi system. 
IVii Music IVaker has been de- 
signed, like all our software, tc get 
the very best out of Commodore 
hardvware. 

■■i Its the first in a series of 
packages which will fully exploit 
the Commodore 64's outstand- 
ing musical capabilities, 
^H Commodore software: it 
costs no moTE, sven though 
there's more to it. 





chart 



Cliff Hanger 

£7.95 

Novelty 

New Generation SoUware 

* • • 

Fans oi the Roac Runner 
and the unfor.unate wolf 

v/ho Irico to onsnorc him 

Lsing wacky devices in 
those old Wafner Brolhsrs 
tartaons will love this. 

You lake the part of Cliff 
Hanger, ar inept cowtxry 
trying to s:op a cesperado 
by cropping boulders on 
him bouncing weights Dff 
trampoines, uslrg nagnets 
to pull anvils over cliff 
edges and so on, 

Cruds bjt attractive 
graphics, great f jn. 



Paddington's 
Garden Game 

CDM-G-I 

ColHnsoft 

Butterfly coHecling 
Paddinaton the Bear has. to 
zip around his gsrden 
collecting butterflies 
v;ithou1 being oltctrscuted 
by tie fiedgerowor stung 
tjy tees or pricked ty 
hedgehog*. 

Like the Magic 
Roundabout came, this 
does not realty make tne 
best use of its famous 
character. The somrolent 
music would nake this a 
good game to play last 
thinf) .a- ni^ht as yon w nd 
down fronr- a winter's 
evening zapping Dver the 
hoe'.ile alion tancecape otc. 



ATC 

Spectrom 48K 
P7.m 

Singulation 
Hewson Consultants 
* • • 

~wo games for tie orice of 
one, though people who 
bought the previous ve'sion 
of Air Traffic Control are 
unlikely tc rush out and buy 
Ihis one just for the extra 
thri I of ccntroliing Schiphol 
as well as London- 
Heathrow. It eatures 
Concorde and the 
occasional radio failure and 
rogje aircraft. 



(continueo from uage 35) f 

tning rcsults in lojs cf cr.crgv and 
cv'cniually in year <ltmi>i;. Cwtiinly a 
TOmpeu-nt aid tnjoyabl; QvtnK, mere ' 
up lo tl»c slaoda'd c<}>ei:icd of Quick- 
slvj itiaii huiiie oitufi R:Lt:iii iclc;iM=i 
from chat &t>bie. 

Paul Bona. 

Tir Na Nog 

■ Spectrvm 48K 

B Accede advemure 

■ Gargoyle Garres 
m £9.&5 

*■ Vkr -Ar "A- 

So.vtE oiD HIPPIES might trv ar.d p:r- 
Mi.idr yni ttini ""ir M.i Nog k nn Ir-sh 
folkbynti thai gained pioininerce 
alor^ with Planxty anc other jnpro- 
nounvcdblc natncs. Thtic people will 
of toiir*c know ihat ihc phiasc is 
Gaelic fjr btid of youth. So h;rc vvv 
lave it, a ODmpuie- g£ine set in ;he 
Celuc Oihe.* Work. There pr.tbably 
arc >isl: computer jokci but narurzlty 
/ou won't iinc any of that ;ort of 
■.hin< in Your Caiiifmtt,: 

liised on ih; cieat Irish mytho- 
ogicjl licro Cuchu.uinii, (hi: gyiiK k 
>ill(sd asa "^>n:pHter n"Ovit"'. Thin^vs 
'wii^ whul llwy ar« toiaj', il k, vtry 
dillirult for a sc t'-rc>pctting computer 
satin; to get tmi< tin shops tv'jiliout (a) 
■^eirnj based «hi a ii ovie, ot (l>) jjoinj; 



SOFTW9 



M^i^ 



lh« wltotc hog and Hc.ually prctcodins 
ic he 1 m.^vie in ts cwn rigtn. 

L'lr Hi. NDg .las taktn the httti 
courst — tht aaion is presented if. 
though a ramcra is pointing :t Cuchu- 
laiwi, whorr wu arc jssurcd wis 
knovvT 3j QioK to his fritnd; and 
triimxi's IV'sorully I wouUI twi try 
Ciltini; the s,ianihliinj knce-jerker ai 
the centre of ihe screen aitytlung otiitv 
than 3ir jnlc.t.% I hjd luvuglii h:iii jt 
least three pints of Guinness. If be 
could play the bws »uinr, he would 
ccrtahly give Motorhcad's Lemmy a 
let 10 worry iIk>uI. 

He .stands ^6 pixils all — rhats 
p-vels, iKt pixies — ind is ointialled 
from the kcyooaid. The animatirjn of 
the characiei is '.-ery imnressivt. 

As he s.ouches disconso aicly 
throu,jli Tir Na Njg, the de.aileJ 
r.<cncry in che foii> and middle 
giourds icro.ls past ,iim Birds if ill- 
onien hover aro'ind tic astk oCKin^ 
Dhomnuit, flipping tieit wii)i;b <.'oi> 




tinuouily in the distance. Cuchukinn 
can carry uji lo four oticas — though 
yoL have to check with the sta'.us area 
at t.ie bottcni of th« scieen to see what 
he .5> actvia'ly «irr>ing. 

Snce evtryone in the Celtic Other 
Wcrtd is actuillv dcid til vou tan 
hope to dc IS daunt them a little bit, 
and should anyone ha.m Cudiuliinn 
soriouii.y he jisl r.-maicriatisci ai the 
enhance u Tir Na Nog — sans 

ObjiCtS 

The lurposeof the gdinc a to ti.n.utc 
and reunite ijie fnguients ofthe seal 
of Calum. Dlc to a brtakd.iwn in 
secjrity, the seal was smashed :iito 
four bts by a serviim of (he Great 
Enemy, which has made lite very 
difficult for everybody, the Great 
Enemy now heing free m carry on 
buiincjs as usual, snvifling out 
galaxies, v;siirg pain and misery on 
itia:ikiiid io ttic cusiotnuTy way. 

Having locMted the picc«» y>u hove 
to lersuadi ih: ovviieis t<. gi^c them 
up. 
Paul Bond. 






'S' — 




UAU/UAIVl 

Warrior 

■ CBM-64 

■ Taskset 

■ Shoot -'em-up 

■ £9.95 

Not a UTiLilv program for com- 
puier-ajied design/manufacture, but a 
shoot-'em-up. Perhaps win the rolc- 
inetginK of conpuicr gamss liiat has 
led to inch steanci olTsprinc as the 
arcsdc adventure and the arcjdc 
straiegy game, we arc now jcdng the 
emergence of lh> arcade vuil ty? 
Maybe fuiiire ^idki Js zipping awaj' in 
the arcade will unwittingly be de.s^n- 
iiit; UHNC eflii.ieul ^(xeUlviil^ ueiu- 
phincs or three-wheeled electric ca.'s? 
The jcreen presents you with two 
tildes of a ineia. plate: the tup and the 
honom. Tlvere are some hole? bored 
in i.. You aeer a rotwt around shoot- 




ing a: iuKcile ohi^ccs Ifh^ pi«««s over 
a bote, he flips through to the oilier 
side of the plate and carries on doiag 
I luck lie iiuiie llt.iig, only u(nt(Jc 
down. .-V> the game progresses, you 
M-e presmted with <1 iVcr,*nt configura- 
tions of slate and more hos.ilcs. 

The rither conftsed introduaory 
pamphle: to the game warns us tEiat a$ 



more and moie of Out e^^riroamant it 

ptintitd and constructed by niactiines, 
it vvill fall to t'.ic machine; to interpret 
itic rules by wliich w-; want o lii'c. 

Life is :le(initeh' on of balance ia 

ths scena.'io. Th« AI 12 is a machine 

tor generating stniaurcs :n cshibitioii 

haJIs. It is nalfiinctioning. I.urkily 

(continued on page 39} 



VOUR COMPUTER, FEBRLARV 1985 37 



YOUMAEVELLEDATBEAGH-HEAD... 
lilQWACCESS PRESENT THEIR LATEST MASTERPIECE: 



T 



^ 



,'fMt I J> if 



■;fvr^'^^?■ 



vmx 



STATUS: READY 




MK 



ftnnsr: edfloa 



^ commcxiare ^l' 

Tliemostbreathtaking 
3-DiSra 



jnodore64! 
Gripping aicadeaction 

ji|| Miiltiplescrolliiig 
^ll screens 



*ELOCITy X •8T1C/K (fOWP 

r.«r ,)ml^ l^ <^H ft(.T.lTU>C 

[iME TO IKPACT: 03:39:6 



THe Soviets 
iaunch a ni^oieor 
trike against major 
Shies in the United 
Slates Mi(J Canada. 
With our ov/n 
nueiear araanai 
dismantied, in 
accordance with the 
Salt \\/ Arms 
Agreement, tha 

Soviets Delievetheir treaehery virtil f6adtd- 
totafwortd domination. Ou" only hope is our 
space station equipped with stesflth 
twrntjers, which can fiy undetected in Soviet 
airspace. 

As squadron leader, you must lead your 
commandos on a vJrtua. suicide mission, 
knocK out tne Soviet launch sites, and then 
proceed into the city of Moscow. Armed with only the 
weapons you can carry, you mijeit <>ftak and destroy the 
Soviet defence centra to stop the attack ! Top muHti- 
screen action! 



C7r' 



U**-5 






£[2*98 



w 



>-<*<M«« 



^^2-^ 



. P&...J' 



U.S. Gold is stocked by all leading 

computer stores induding: 

BOOTS WH SMITH JOHN MENZIES 

WILDINGS WOOLWORTH 



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The Parkwey industrial Cenire, Heneage Street, Birmingham B74LY. Telephone; 021-359 3020. Telex; 337"26a. 



StwM 
chart 



David's 
Midnight Magic 

Commodore 34 
i:y.9i> 
Arcade 
Ariolasoft 

• • • • 

This old erocerfcund 
original irunrphs over othsr 
oinbait slmulaiticns in its 
'Qtrarkabte mim cry of the 
actual physics of a pin- 
:ab e. ^ou can cnarge the 

strenglh with whic^ you 

3ul ths launch spring. 

Psychedelia 

CBM-64 
£7.50 

Freak-out cats 
Uamasofi 

• * • 

What v/akss Jefl M nter uo i 
In tno momirg? Hie llama ] 
cloclt, of cou'se. 
Psychedelia is not a game 
— Il'b d piuyiciiii w riuli 
generates patterns on a 
computer scieen. Jeff 
exhorts us tc (a) turn oft 
the lights, (b) put on 
/irhatever music you like to 
freak cut to (c) pick up the 
.oystick aid Jo It vnith 

fei* ing Thprfl i<i an aulo- 

deno, or you can define 
parameters cr call in pre- 
sets, end you can record 
abcut 30 minutes of 
loystick input in memory. 
GuitranttseU Xu DIuw ygui 
mind, as they say. 

Siatlx 

BBC 
£7.35 
No/elty 
Psion 

• * • 

A Clos»i copy of Atari's 
Unsung classic, Qix, Statix 
does rot quite get the 
detaUa right. Thsre is ao 
high scors table, and not 
as nuch variety as in the 
original. Still, the game has 
immerse appeal — of the 
sort guaranteed to grab 
those i«ho d sdain shoot- 
emups. 

Superficialy it resembles 
a pain-.er-typ9 game, but 
with tde crucial differenca 

that you are not confined 

to a grid. The idea is to 
cotdon off 75 per cent of 
the sceei while avoiding 
the Statix as it flut:er£ 
around the open territorj'. 



(contiryued tnm page 37) 
then: is a MAD-2 droid iiside it — 
i you miiM wc itis to in,' and find the 
misiing cr\'0-w3fer mcduk w.tich is 
the Aou-ce af ttic irouslc. Of coirsc 
ihe :M-12 his irtcrral defence systems 
and this is vrhai your droid is stiooting 
at. 

Ydu havclo work your wiy tttrough 
dilfcrcn: levels — a maximum of 8.92 
»^.[u;ii!> i» tluimcii but siiKc tbey arc 
all raihef d-ear.' ard meiallic ilKre is 
!)Oi much 10 choose betwetn ihcm. 

VCnai you tuvc co examine is ttic 
actual colour of the plitcs. All plucs 
on ihc entry level lave a to? cclour of 
light bUic. There ire eigh d.fTerem 
colcur groupings. DinVrent colour 
i;rnupir<js h3v>e diffcrem wjys of 
dealing plates. Or. some Icvtls jou 



GO 



masc 

■ Ar.r.rnfioft 

■ £9.95 

■ Board Game 

• • • • 

AcoRKsopfs Go profcram is a con- 
' ^itJetiibte iiii^iuvcti.viuuii l:dgc Cutn- 
putcr's vasion reviewed in the 
December issi;e. F*or on; thing it 
plays on a larger tward, 1 } by 1 3. It 
.ilso pJaj's a stringer gime 

In Jaoan Go is he naii^tnal tjoerd 
game, ^iavTil hy millions including 
several ImrdreJ ptofessional play:rs. 
Hilt nvrr hfT& y h9< y**! 'o Tally ntrh 

on, and the prc-blcm n:ost Go players 
hav£ is fincing someone (o play uith. 
Which is why o comp«i«nt heme 
computer vcision i> particululy 
welcome. 

The gante I; f^i more dlffcuti io 
pfogran than chess. Recently, com- 
puter lx»ard ga.mc cxptrc David Ixvy 
prelicitd i.Tat :\'cn in 10 ycais' tme 
no sro^ram will ix able to play G) at 
anything asovc bciiinter level. One j 
rcaion for this is that the game docs 
not lend .iself to t^.c brute force 

approach at easily ax chest. On a full 

19 jy 19 board slrin calcuhiion of the 

Castle of 
Terror 

■ Comrr.odore 64 

■ Metbourne House 

■ £9.95 

■ Ad/entur^ 

• • * 

Nc .MAN HAS ever returned fiom the 
Cattle you ar; informed bv an old 
man in a pub. T.ie reaction of any 
scrsible person to this nc\rs would be 
to put as .iwich <£tta.-icc a* jKJSsiWe 
between him and said Castle. But, 
adTcntjrcf being whit they arc, off 
you go, ]:ausing only w grob ony 
likely looking obiects you fir.d lying 
arcane the plicc. ' 

The ganc is in mo sections, the 
first is phyed in the village. When , 
you think you're ready to tackle the 
caFtle yoi: hive to load tbe next 
section. 

Success dc:}cnds an per$is(tnc« 
and ck«e exaraina'tonof the ficttres. 

There are 40 graphic screens 
alMgether with arcompanying eerie 



^^^^^^ level. The solutton to the game 1 



drop !ime-b<.mb», on oiners — shoot 
to kiU. 

Every iO cften yoi get a chance :o 
jump levels, othciwisc t.Tc game 
voiiM bt vc\v boring m it :idmits n 
the puin^ihlet. 

Yoj a;e given a r.'>ugh map, but it 
Civejs only one qu:ricr of the entry 



level, 1*hc jolulton in the game lies in 
stieen &K2 and a targe phase counter 
is provided ai the top right of your 
scieen to mark your p.ogrcss. You are 
prohibited from cntcr.ng rcriiin arcai 
without tokens or passwords. You are 
told where to find the lukeiu — 
occasionally — after eack competed 
sCTccn. 

Paul Bold. 




consequences of a p.irtinjlar move is 
not >o important. You cojid argae 
that :t offers greater scope for inruitivc 
play rcstine on piiter.i rtcofnition 
ukI 1 "fxl" for the position. 

In vicA' of ths it is not siirprisiig 
lh(»( Arfirnwft On ;<i hrilcr or tfl<^lr<i 
than stritcg/. The pro|;ram tcids to 



get boggod down in sixxring a small 
1 group of Jtoncs vhcn there are lirger 
gains to be made elsewhere. 

Noncth:le&s nrost beRinrers will 
find i: h;ird to handle. As ^'ell as a 
handicap optbn, thcic arc tvo Icvcb 
of pl«y and it i< quick to nove at hOth. 

S'Vno/j Beestey 




mus.c. The program ii ra.her fiissy 
ibott icccsting words, but decs 
allow vou I) er.tcr sentences :o that 
you can skip sei-ersl sc-eers at otKe. 
Your ultimate quest :s tC vanquish 
the ivil Count, rescue the beiutinji 



youn;; miidcn aud vith a bit of luck . 
line your focket n ;he process. 
iDsia.it dealt. — naturally enough ~ 
liis around every corner. 
Lee Paddon 

(coniini.od on noxt pag«) 



YOUR nOWPllTFR. FFRRIJAFY IflftS 39 



Star^ 
chart 



Tristan and 
Isolde 

CBM-t>4 

£8.95 

Arcide adventure 

CRL 

Will the/ be playing this 
one n tie 'oyer between 
acts at 3ayreuth? I coubt It. 
Originally a Gerrr^an gane, 
this may tiave lost a litt e in 
the translation, but v/hei 
you consider the sort of 
trouble :hai people hav€ 
gone to in actually using 
real nythology in games 
like Tir Na Nog, ttiis one 
does little justice to the 
Ring CyDle. Ycu piiol a little 
rran throuch rnnms and h» 
gets eaten by iionsters, 
Ircidentaily since the 
conttal charac:Qr6 arc 
KuniDert, the hero ard 
Kunigunde the nnaiden in 
dlbli4»t> — no. to mention 
t^e tnlikely W'umper. the 
baddie, where do Tristan 
and Isolde come in? 

The Hellion 

Oric 1/Almos 
£6M 

Si}oo(-einup 
Orpheus 

* *■ * 

With 10" screens, ths 
shuuid l<eep Ortc 
shoot-'em-up fans happy. 
YourHellioi — mutcnt 
wasp — can be n-oved 
using ths cjrsor keys, and 
the baddies fJy at you from 
al di'eciiors. A fun game 
with a nice sense of 
humour. 

MacMan 
and the 
Caber Eater 

SpectruiT} 48k 

Sinclair 

Educational 

• • • 

The object of this program 
is to teach four to eight 
year olds to aod arid 
subtract simple njmoers. 
This is cone by multiple 

choice. It's visjally 
appealing, and the quicker 
ycu can confie up with the 
ccrreot answer, the quicker 
r^acMan wilt build his 
cabet, foiling the dreaded 
caber eater! 



Witch's 
Cauldron 

■ Spectrum 48K 

m £6.95 

■ Mil<K>-Gen 

■ Adventure 



Bir.MPKiNS OF the world uniic. You 
bave noihin: lo los: bui your shape 
— you have bcoi turned imo » toad 
ty uvjcked wich ihzcl. Having: 
fiilnri rh<> aitiiiiioni for Pajl 
McCartney and the Frog Chorus, it's 
dnwo (0 yoti lo >ce): ou: ani cc-ncoci 
33nic ajKlls and potionii to hdi' t-uu 
r:pain himsn shapt. 

W.tch's Cauldron is a giapWc 
aUvcitutc gjime witi a .'octbutiiy jJ' 
nc.irly :00 wordi. You ran luin 
mound in a rocm, geiiiti); ditVcrcnt 
wailf depicted en the screuj, ind if 
you exam nc ihing& like the 
GR/.MOPi:OMi very clwtly. yr-n 
vili find a DIAMOND 

You can't pick up anything hat a 
toad cctildn'c pick up, which 
tnsicatly iiK-ans that anything lar^e 
will have to be left bc.vinc. Kow a 
iu,ivl .ut !)<.-» ^ diauonU ii a rayst^r}' lo 
ine — I jtucsi it'} ok>y if no^jnc givts 
him a hwrtj slcp ai the back The 
plus >idcort)vin< a toad in this game 
it thit you can lop onto \h'mff> like 
niandepi:cc; and examine them). 
While ycu cjn't optn any dooiv ycu 
cm hop up the chinnc/. 

Tl>ere is pirni/ of StY^'l' hcrt at»d 
for y-iur firs: trick joxi can throw it 
over yoLf sliouldci. I'nfoftunately 
one of Ha?.d'r. unpctiMnt crciiurcs 
generally happens ak>nK and devours 
you, ju$t a!> vou are :ibo;it to btcotrc 
iiiuic Midiith acceptable. If you can 
avoid bccotiuiig paa of a monster's 
ii.cnu, you have .i schedule of ibout 
1<) rociamorpho^-s to go through. 
Talk about gating iwaj ht a 
chanr.c! 

Tlu jjTogfam underitantis plain 
adventure Btglith; it is pcsiiiblc to 
(jive roiDinanfls like "PUr ihe water 
in till c3uldr:^n" 

The jatTK coniaiiu over 9!) 
difrcKOt to.'alion] — niOM uic 
ilusi.'atcd with a full colour hi-rcs 
picture. No: a I the objects anc 
useful, and t tcrc arc supposed to be 
aiourd 700 ciffcreni pwuible aaiotK 
in tlu game. Gord I'un, but /ou haw 
10 rcncmbcr that one ^n.all step for a 
man :s a giant leap for a frcg. 
Paul Bend 




^f. ifit? 



Cm»^??^v 



cr 






Gift From 
The Gods 

■ spectrum 48k 

■ Ocean 

■ £995 

■ Arenas Adventure 

• * • 

Ohtvriiu Hi\s A (.luUeiii Mum ran 
off with another man ard (len ran 
off with his kingcom The only way 
he can get it ba.-k .s to enter the 
Labyrinth 

The Labyrioth, apart fiom be in e .1 
tricky place to find your A'.ty aroutvd 
is filled with varicus monsiei^* irving 
rrt «»p iiir hiTo'« <ncr?j', ?r>rtun;«cly 

he has, friends in hi)>h places: Zciis 
haj gi*en him a Sword md Apollo 
Km given him the Scvct Tc.irj of 
Ictrus which can be used to mark 
chambers wiif.in the iabyrinth. 

Apart ftom the mon$t^rs> you've 
als-) got to cope with muni who i.^ 
bujy moving abjects aro.md. She'll 
also kill )t)ur sister Hlecira, given 
half a chaiKc, A'hich vrould be a blow 
as the Oo<1s hive re/ealid the 
soliCioii of your tjuesi to her 

All this plot detail ;ivcs the game 
plenty of favojr. a iv eoToplcmcried 



>s 

Vou con' t 

>UP 

Yoo ar& up the ohirine«# 
Here i s : 



by the gfLphica i>f itie ruld:on:b.i, 
filled with ptUais, :olvmnj, and 
animated monster;. The uonitols arc 
easy to use u.<dng a ci>mhina:lon of 
joyitick rrovcmeDts acic tlic .Ire 
but on to :nove, fly, fight, pick up 
and drop objects. There is also a 
pause key which helps when making 
a map. 

Your task is a Io»k and difTiculi 
one, It'j a iirgt ma7:e, and even when 
you find the obj«ctK, ihcic aie only 
six real ones among the M sc:Htcrcd 
around, Should Clytacritesira 
m;iti<ige to ^iU Clci-liu, yuui tu^k will 
became immenscl) mere diHirult.. so 
much of your tioie will be spent 
chining Cilyica.'ncsrra iroi.nd ?o that 
she doesn't have a chrnce of jetting 
to £lcc:ra. 

The Greek legends of heroic quests 
maVc great theaies for Raines and this 
is certanly a well ;seciited rxnmplr 
Lee Paddon 

Star Strike 

I Spectrum 48k 

■ Real Time Software 

■ £5.95 

■ Arcade 

• • • 

FotLOWING UP the r successful 
version of tlic axadc classic iT; I ank 
Duel, this is an excell:nt version of 
the current arcade hit. There a;e four 
>crc;ns to bairle thruugh: a space 
banc vith the tia tlnhtcrs, a low 
level run o/er the tjrinirnl rlrfcnfTs, 
:hc trecch, anc tlrally a shot at the 
reactor. 

Tner« vr: many di.Tficulty levels 
running from the t trkcy shoot to the 
>uicide ."un. All titages arc in 3D with 
y-oui cucJ-pit cjiiiFols ir. the 
foreground. The comrols arc nice 
md responsive with climb, dive, roll 
ind lire; a variety of joysti;ks .•an be 
isec. 

Gjod crear-and-poiatocs arcade 
acticn. 
Lee Paddon 



iO YOUF COMPUTER, FEBRUARY 1985 



the only choice 




Holdfast 



Gems of Stradus 



Stat Avengers 



Galaxia 



Music Composer 




Logo 



Database 



ZEN Assembler 



EASIVAT 



Home Badget 



An autstanding selection from Kama 's rapidly expanding range 
of Entertainment and Application Software for the Amstrad 
CPC464 Micro-computer. 

Book 

• The Amstrad CPC 464 Explored 

This superb book is designed to let every CPC464 user, at 
whatever level, get the most from hiscomputer. After an 
intTodiirtnry section on the special Basic features, the 
book looks in depth at ihe excellent sound and graphic 
facilities includinq: # Animation Windows 
^Character sets Multitasking 03 Voice Times 
M/C routines for Basic Use of Zen Use of O/S 
Sample programs 

Available from your nearest Amstrad CPC464 Stockist. 




1 
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I KuniB Computers Ltd., 12 Horseshoe Park, 

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Pluasti seno full catalogue oi Aiis:rad CPC4S4 
prodjcts. 

Nams „ 

Address „ _ 

Phone 

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Now on 48K Spectrum 




The ultimate 

underground 

adventure 

Superb scroll routine, described by experts as one of 

the best pieces of spectrum programming ever! 

Sixteen mystical caves, 5 levels of play, 

joystick or kevboard options. 

one of the toughesttests of strategy and reflexes 

ever! starring "Rockfo'd" i m the inccrrigitle 

burrowing bug ;n his Tstless quest for gleaming 

jewels. 

U.S. Reviews 

". . . Boulder Dash should De leading contender 

for anybody's ac:ion-ganie-of-the-vear award." 

Burt Hochberg GAMES Magazine 

" 7i magic?.! mix of challenae, charm and 
originality . . . essily one of the best conputsr 

games o^ the vear." 
Micriaei Bianchet cnicago niDune syndicate 

"This game v/ill be mentlonec In my will 



wiat sHlccn is ana integrated circurts 

were always meant to be. . . subtle brilliance 

snd unceasing magic ... in a class by itself . . ." 

Craig Hoiyoak Deseret News 

"First star hss done a first rate job 

on BOULDER DASH ... the graphics 

aredazzlirg..." 

The Video Game Update 

"BOULDER DASH ta<es the cake ... the 

overall quality is excellent . . ." 

John Skoog K-Power Magazine 

This one's 
hot for xmas! 




to: Front Runni>r. K-soft distribution, 
620 western Avenue, London W3 OTU 

Tape C7.95 kicludlnoVAT 
Rush me Tapets) 



Name 



Address 



Post code_ 



Tslephone. 



I enclose a cheaue/PO made pavatjie to 
Ksoft distribution for £ 



YC«/BD 



.(post free* 



or deoit my /^ccess/Visa* 

Delete as appicabie 

I /vouid ike to ne ar news of tiore Front Runnsr 

releases I I Ves pteaseaiow2i daysfordeiiverv. 



NEWS 
oaeo 
rs s u 

tt t f 
h h 

The crystal ball 

At tie time of wrting, 
Dcomdark's Revenge, ttie 
fol!o\ft up to Beyonds biiiiiant 
Lords of h/idright, has only 
been on the msrket a week but 
alrsacy I have heard of one 
pl?ypr wto h?»s cnmpietPd il 
Astonishingly, David Harvey Of 
Dereham in Norfolk managed 
to 3u:ceed in the new quest 
after playing it for just six days. 

There's still the thid part of 
Itm lillo^y. The Eye of tie 
fvloon. t3 :one. We lesser 
mortals are sti I gathering our 
armies in part 1. 

If youVe got any Christmas 
cash left, all thee parts of The 
Ket Trilogy (ron Incentive 
Software a'e available in a 

ha^cJsome gift pack at '.ho 
special price of £12.95. a savng 
of £3,55 on .he set. A splendid 
ba'gain far adventures. 

A helping hand 

Readers — can you assist 
wi:h a plea tor help form B. 
Kamphuis of Thp r4fitTfir:anrt.«; 
concerning Duicksiiva's 
Smugglers Cove? 

Ho can't copo with the wide 
trencti, oak door, trap door 
and collapsed tunnel. Can 

dliyui B llbilp? 

=or Aric's Goldsn Apple 
players: 

P Shadow a hindrance? 
ELOH OG NEHT FFO PMAL 
NRUT 

■ Beggar and crocodile 
awkward? 

CORC DEEP: ENO REHTONA 
HCTAC; RAGGEBOT 
NOMLAS EVIG 

Dying af cold on the glacer 
in Acornsoft's Countdown to 
Dcorr? 

HttUALti to UNb I A 
RESAHP ERIF 



Sorcerer of 

Claymorgue 

Castle 

Various 

Adventure Internatlcnat 

£r.95 

'Tmsis the tx&t idvcnlurc out afmv 
loiihcr pouch ihis month. I nuiK 
confess to liking all of Scoit Adan.;. 




Our nan with the 
brass lamp and 
the key to a 
thousand 
nnystenes sheds 
light on new 
adventure 
programs. Lost? 
Neve- fear, Hugo 
North is here. 

Tower of 
Despair 

Spectrum 

Games WoiSshop 

£7.95 

Si'k<; rnvM o\:'Ni"<s ihouU) keep a 

<ih»rp ryi- mil for I lis. Il i^u icxl-ut)ly 

.idvent ire wiih .i ■>if; difltrcnce. Kor 

iiisuiicc, ihc thanicui sit \\n tecit 

tmma«ularely rcdcr.)gnc<i tnd 

decorated &o ihat i.ic i:xi appears tike 

a monisiic illuminated man.isciipi. 

Vc'y a:ir.-Ktivc. 

The ;idvvt)iurv ib an enitttalliog 
airoo.sfher> and i.^ in* aginatively 
dc'iailcd. Tills is an adveriurt wkere 
0!<fmiring objcci^ -^ill p^y rich 
dividends. A jlosiy toofclct sets the 
Kccnc ^nd includes a couple of maps 
and a numbtr cl" pictures of the 

You must firsi find the Cold 
Gaunilei befo.'e yau jouney lo The 




4 




W- 






H^j^L 




\m 


t|^ 


1- 


m 


y|M 






^t 



adveniures but this is definitcl) hi^ 
finest yci. 

Vou plw th« piri of KMn^'ick, ar 
iiw.Yperier.ced wizard, wliosc i)iis$toi 
is CO ima Claymorgue Casrle anc 
• ciovo 1 3 lusl Muii. Whcii yju iiaii 
you alrcacy have a number of spells 
and sviir find more t-n juur travels 
Only trouble is, you «on't know vhal 
the.<5e spel s actua.ly do. 

T you want acractiv'e gyap'iic$. 
vou'll find ihcm here. 



TovxT of Despair, ihcie tc overcome 
the owner of the Kingof dkuits, :he 
evil Malnor, who orce more 
threatened the land. 

Tower of Des>air is. just he 
protram fo.- chose vho like thick ;nd 
rich detail, ooctlcs of atmojphire :nd 
plenty of challerjie. Gatr.cs 
VX-'o-kshop irc perhaps better known 
for their exikriiise itt other areas of 
the fantasy game Vfor!4. 

Blade Warrior 

Spsct'um 
Caole So'tware 

This if .\ thki .idvcntuic, writcn 
with the aid oi" G l&oft's jbi«(uitDus 
Quill. Th:: ^anie ha<t a largi.<ih 
vocibiitory — over HO /erl-s, fast 
response aid an ini;re,sting plot. 
Voir jch i; to hurt down iht Black 
Witch, folbwinK in the fooEs:cps of 
Maur :lie Wi^rd who went bct'>ro 
but has not been hcaid of in m-,.iiv 
moon.'i. 

The gaiue has otit of iIk best 
opc.iin^s I can reinetnh«t feeing in 
an tdvcnture. You ha^e been chased 
by 1 large }and of Orc.t and in yoiK 
iiiix cly lu e^kii^e ;iuvc luit u.t youi 
posic&s-Oiis. Ytu njw stand at a dead 
end, a •Aall at /on* ba;k. Ihcre is a 
solid door in tJtc .vail but the Ores 
arc closing in for the kill. 

The wall is unclinibableanc if you 
think that siir.ply rushing throLgh 



the door is going to iclp, think mjain 
— llic Orea 'iliaigg ihruugh utiO tear 
yDU :o pjcc<s. As they sa> on TV, 
now get out of titat! 

Forest of 
Doom 

CBM-6'i 

HenguM tsooHs 

£4.73 ■* VfiiT 

'I ItlstS \ eotnpuieiise<l version of tlie 

b'.si selling b'ig:itirg Fantasy 

gainebcKK of the same ranic. 

Il IS muni/ a ext <Mint:, be irosc 
being prise r.tcd leleiyjje style on a 
o'.antscript - a scrolling; scroll! You 
matic dcirisicno by lelcctin;; fr^m o 
number of choices s vcn at the 
appropriitc poim. 

Tlitt gitne leii alns vey fiithilil to 
the hook bin ir order ro :ram the 
whole tiling on to a micro, some of 
ibc gimc's data h3.s to he lo:.dcd in ai 
diffctent stages. Th; program auto- 
tnatitalK tells vou vhen to do ;lits 

Tliicrc are a number of options lo 
tnake the pla>'ing enioyablc, Yoj can 
cintrol t le spiied :n which this text is 
fainted, ;vci. pause it, and can rstuin 
CO the start c.f a section, just lik; ycu 
Muuti luiii bin.k u pai^' ill il JOU4. 
You .an even store tnd recall a scrcU 
fo ytur Dwn cot — very bancy for 
inakittg nolej as yoi. play. 

1 liked it — a splendid fantasy yacn 
and a refreshing diange froin the 
usual st\le of adventures. 



YOUR COMPUTEF. FEBRUARY 1985 43 





7te5teWadM/ao.teOTmerf««s*to" 



vr*¥lmiti!L 



7 tfW DP mail u. I- ' •" "*"" V - ; - ' ^ ... . . ^ -„>« 

.binsdwithoutstandingifaphiccaoaDtlities-^tapfLe 
' I'tbreakthebink. 




^ on 



•CHOM^ 



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■ 


V I 


1 


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t 

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4 

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(//?c. VAT) 



Specification 

: CUS1451/D03 

I: U'Ci Monitor 

HOB TTL input 

! 653(H) x585\y) 

OdPitii 0.4Im 

AisomhbieinStindMsoimn 
v€isionfororJy£225bc,VAl ■ 



\JiJSM 






r- •' r^ »• 



-ry^tl¥t.'w'--/r,'.r 'Cfl 











^^-S,. 



S ^ 1 I • 



mm3l 



9< 




^V.V.Sfi. 






K^v.vA'/Avv«y«^^^^^^^^ 



SINOy^R C5 




Our Uncle Clivemobile may look like a latterday Mod 
scooter but II doesn't necessarily mean that 
Sinclair's gone off his rocker. Win one of these C5 
electric super trikes in our fabulous February 
competition and be the first silent rider on your 
block. 



RULES 

Lj I fiG Winner of the cotipetiiion will 
be the person who numbers the 
f^nliir^R of thft Cfi "iorrftctly and 
enters the most original idea for a 
computer gadget to go in a car in 
the view of the editor. 

n"he name of the winner will be 
prirted in the Ap'il ss.ie of Your 
Computer 

□All aniries must arrive at the Year 
Computer offices by ne last 
working day in February 1985. 

□ Each person may enter the com- 
pet ticn only once. 

□Entries to the conpetitior cannot 
be acknowledged. 

□No employees of Business Press 
International or their relati(/es may 
entsr the competiticn. 

□The decision of the editor is final. 

L jNo correspondence on the result 
of thecompetitio-i will be entered 
into. 

□Business Press ntarnational 
assumes no responsibility or 
liability for any complaints arising 
from this competition. 







^ 



N 




LAIRC 



^\ 



/^Aj^efof 



Idea for gadget 



Put yourse f in S r Clive's place. You have just launched your C-5 supert-ike and before 

going on tc produce electric fourwtwet cars, buses, truska and juggernauts, all guided by 

artificial intelligence and travell ng at 20DnnDh, bumper to bumper, you want to ease 
yourself in by inventing a camputerised gadget wiicT will make driving easier or more fun. 
If vent agaaget trengive nanams, f ii in ine coupon — 'emembertnc to puitne features of 
the C-5 in order — a 1 in the box not to your favourite fcatu'e, a 2 besice your next 
prefererce and so on. Then send it to Yojr Oompuler, L-22', Quadrant Hojse, The 
Quadrant, Suf.on Surrey SM2 5AS. 



Nameof gacge:. 



n Low running costs 
n Low purchase price 
□ LightAreighl 



~\ Easy to park 

~\ Can be driven by 14-year-olds 



Name 

Address. 



YOLRCOMPU-ER FEBRUARY 1385 45 



In XVJ lNr« rSTRY notorious for broken delivery 
promises, the Ent::rprise stands head and 
shoulccrs above the conipttitiDn. First seen in 
public in Scptanhi;r 1983, the machine is 
only now going into mass production. 

When firet announced, it s«;en>i:J n> ofFc a 
lev::! cf perfcrnianci ntost mi:ro owners only 
dreaniid abojt. However, a bt of bytes hsve 
flowed under the bridge since then. Several 
innov£tive new arrivals htve beaten ii to the 
high fitroct, and the jodusiiy rtalwarts arc 
even tnori cnirtnched with huge user bases 
and software support. 

A year or so ago, a machine had lo bt good 
to succcec, n>w it has lo b.: very jood to even 
sur\'ive. So how docs the new machine 
meisure up to the competition? GenfT 
Hollingtoi, the designer if ihc Enterprise's 
casing, had some hard woids to say about the 
looks of o her machines when Your Cohtpu'er 
interviewed hiro ir> January 1 ?84; "Most 
home computers are just a printed circuit 
bojrd sandwiched belwei;n IWD sheets of 
creiU) plastic, wth a few keys sticking Dut of 
the lop". 

The Hnterprisc it certainly diironrnt. The 
machine is only 33nim hig:i, ichievfd by 
mounting the keyboard in front of the mzin 
PCR. The box-like contours of other 
machines has also been eschewed f<;r a mere 
rounded look, Lik." tnov.' <xhc' micros of 
receiu years, yoi; can have an/ colour as lo.ig 
as its ijrcy. bvt ai Icisi ilie drabneis is relierjd 
by a colourful keyboaid, mi.x green control 
keys and blue funcii:)n :<eys. Whe:he: ycu like 
it ii purely :i m:)tcci of personul la^t;. 

Keyboard is disappointing 

The keyboard itself s rather a disap-XMnt- 
meit, witi a rather spongy feel ihat will not 
cnccar it lo .oucli-iy|iisi». Ou il.c plus side, 
I he keys are nicely Irid out, with everything in 
the usual positions, and any odd keys t.ickid 
well out of harm's wty. Th; most striki:ig 
feature of the keyboard is t!ie built-in joystick, 
itisiciK uf iltc more usua. Cluster of cursor 
keys. 

This looks a bit on the flinsy side, and it 
wil. Ix intertstinj; to see hov much punish- 
ment it can take fram the gjmes ffaicrniiy. 
That aside, ii is Lciiaiiily i very easy way to 
sdit text and piogran's, although t.ic 
liainfisted mJKlit easily knock it by mistake. 
There arc eight function key*., whidi can :>e 
used with the shilt and Alt keys ii- pradvce 32 
:^ombiuations, 

Around the back of the :-asc arc a series of 
ports. Enterprise seems to have cut ujsts here 
jnd we are lel't with the old edge connectors, 
instead of a few proper %octets w^hich com that 
litilc lii( cxin. There jrc ports ,''or two joy- 
nicks, an RGB monitor, a printer fnd a 
ierial/r.ctwork port, 

Theie are also th; necessary sxkeis for a 
elevision, a power supply but no on-ofT 
jwi ch. iind A casjcttc port. Thr icscl Intlloii is 

jseuUy pisition.-d ut the extieme left of the 
rear panel One press for warm reset, two for 
cold. 

The Rom hay on the left of the machir.e can 
jccomuiocaic Ruuib up lo 64K and on t'ie 
right is the cxpansior. socket vhi.h gires 
access to not jusi the main address anc data 
jusis, but the audio and viceo circuitry as 
well. 



REVIEW 

Enter the Enterprise, 16 months 
and several identity crises later. 
Nick ULA takes the blame for th 
delays but also Lee Paddon's 
praise for producing some of the 
best graphics around. 




The internal iiicltiutiuie of he Knierprise 
is unusual. Bank switching anc s:dcv^'ay> 
Ronii have l>een taken to their logi:al cor.clu- 
si;)n. The tddress bts ii ester.dcd fmni the 
usual 16-bi: Z-80 bus to 22 bits anc hence 
4Mbyict. Thi} is achieved l>y dlviU.iig ilic 
address bus into two. 

Tlie tA'o most significant bits are jseJ to 




select on: of four 16K pa;es. This 
address is read from an cii;ht-bit register in 
Dave, the Enterprise's riKtom III A, which 
also handles sound prcduction. Of these 256 
pages, thi top four ire the video Ra;n, which 
can also be stured by programs, and the 
ojiiraiing system's scratchpad. 

The syuen Ronr. sirs n iht- hoimn two 
pages, and th; cartridge turns up in pages four 
to seven. While thi?. is all very clever, it does 
rather tie up the processor, which has to mess 
about with page address. Stl.l, when you've 
sot a /.-8flA prfK«<c.ir mi-kini; along at 
4iMHz, you've j;oi a little time to spare. 

The operating system EXOS has been 
designed for flextbiiicy. All devices are 
accessed using tharnels. This will af course 
allow ^impli' eyp^nsion 

Apart from Dave, ihc other custom chip in 
the Enierpris- is Nick, ^ippareitly the cause of 
all the delays. Nick handles the screen, anc it 
hardly seems surprising some troubk was 
encountered with this rcvoli cio.iar/ design. 
Mcst computers hive a cer:ain atnotnt of 
memory assigned to the display. This might 




1 



46 YOURCOMPUIER, FEBRU^RV 1935 




vary wir.i the video mode in use, tut you are 
always sure where it is. 

Nick changei ail that, .^nv pen of the MK 
of Ram can be assig;ied to Nick. The user 
simply defines parameters of mcdo, width and 
height, and the operating system assigns the 
required amouut of Ram to it. 

It is a similar concept to graphic windows, 
bai ihcst- windows can be slid ground the 
screen at will. There arc f:ve mc4cs, lo-rci 
graphics, hird;varc text, hi-res g^raphics and 
software — BO co.umn — text, and a.iribulc 
naode which mixes the two. On top of that you 



alsc harC to specify the nunbcr of colours you 
want. Thli can be 2, 4, 16 or 256 colcurs. T!ie 
more coloir, the less horizontal lesdution. 

Ma-vimtm resolution is 672 wide by 512 
deep, although this can be doubted using 
"inicrhce *. The test i* or. an 8 by 9 matrix, 
witi 7'i lini*^ The- v»^r<ai!iiy rf thi' viH.'n 
display will enable complex graphics to .tc 
built up easily, anc w.th a nodest memory 
averheid. 



When Dave isn't busy with raemory maps, 
he's, producing seme very pleiisant rounds . 
There arc three sound and one noise cliant.els. 
■["he sound .s in stereo over eight octaves, and 
rather wasted on :hc mtcrnal spctker, using 
external speakers or headphones is a must if 

you wane to apprfviiitc Diivr's Ifirr piiinis 

Each sound command can sta:e volume and 
pitch as a function of tiire, in s:ereo. Var.ous 
special ettects can also be produced uUng 
dstorticm, filieriag, using another sound 

chan:iel lo d«wrminc the rm-n(T fmiiii-u-y, 

and ring modulation. 

The Basic corr.es on a cartridge atid is 
another one of tile machine's strcng points. 
Whilst retainiig all thi- iisu^l features of 
standarfi XAirrosftfr hisif, I.S-Rnsir has 
ftatures which ncrmilly only come ss Basic 
extensions. 

1 he cenrral philosophy is obviojsh to 
encourage the programmer to think structure, 
jinil borrows many features from Ptscal. If 
this sorr of language had beer, the standard 
when Basic got going, il might not have got 
(conunued on ne>t psigs) 



YOU=^ COMPUTER, FEBRUAH" I SiOJ ^f 




mwm 



miiuj 




iconttnued from orevioos page) 
such a bac ncmc loi itself. 

Apart (Vr»m the Uiual If . . . 'I'hen . . . Ehc 
Structures, whict. can t-c cirried Dvcr several 
lines, ii s'jpfons Do loops using While or 
Jniil conditions at the beginning or end 3f 
ihc loc^. There .s also an Kxit command fi>r 
turtlier flexihiliiy in vtructurcfi. The Coje 
s(ji':mcnt is rather like seiting up i "flag" 
which is ti'sud to determi.ic ;f cnsin state- 
ments are executed. 

IS-Basic supports the use of "global" ai.d 
"l(ir:il'' variablef. This meaas ihai a f.u'7- 
rouline can use the same variable as ihc main 
program without being a(Tected, mere y 
pasting purainetirs to ;he mcin prcurani as 
needed. This means chit subioutin<:> can be 
transpcrtable from pcogram !<■ program, 
iviihou having to bi- rewritten. 

A;i exie.ision A' his idea is that several 
prog:rams can be resident id Kain ut ihc same 
lime, vith ihe s;imc line numbers. Ccntr.>l 




and variables tun hi passed between iliein 
whe:) ediiimg programs 

The ;>rincipal graphics cominarid is Plot, 
vhtrh nirwos tlie graphics cursor If the co- 
ordinates arc follrwel by semicoloHj a line is 
drawii beiwcen ihc nc\v and old position i:i 
the current ink coiotr. I'hcre is also a sDt cf 
Logo type f?raphics coiiitnamJs as we.l as 
P.lip>i(' and Fill conmands. Ink. Pen oni 
Eorccr colours ar.- selected from a pjlci:c cf 



256 <;t>l'iurs. These can be se.ected by 
number, or name, o: you can specify the 
amount of red, b.uu und green ^ou want. 
Pcssibly more jsc to commercial tttiits and 
pt^nttrs ban programmers. 

Sound co.niniancs are simple. The Basic 
sojnc comrraiid caat b:: fcl lowed by a number 
''of paranietcf!! :4uiing pitch and volurrc over 
line and any special eJTcas. A scries of sound 
coiirrands an be issued to the bur cliannets, 
and fhe$e iit in a queue waiting to be 
executed Ir case you lose all track of the 
duration of toundt: on the voriou& c.ianncb, a 
SjDc command wi.l set you straight, >r just 
Clear the queue and start again. 

The Basic is generally very comprehensive!, 
an J realK' lets ihe user get at the guts of the 
machitic without hiving lo rc5ort to machine 
c()<le all the time. If anyih.ng ii might be 
accused of being rather toni;winded and 
unwieldy, btt ihen yot don't have to use all of 
it. 

Tht vtry wicc forn'.at of lJu;».c commnnds 
mianj that very liille error checking ii done 
wKen ihe progrtm is entcied. There are aho a 
ijumbsr cf words w.Tich can otily be entered in 
immediaic n:ode, aUluxigh this is really only a 
minor crIiiciKm of a fascinating dialect of (he 
Basic language. 

The only reason I can in;aginc for a 
prognminer wishing to leave Basic is speed. 
I'lm afraid TS-Ra&ic isn't joiog lo keep Hecb 
owncre rwoke at night. Uvcn the humble 
Sp;cirurr. shows ttie machine a clean pair of 
heels on mosi lienchtcits. 

Included with the .iiachire is t.ic power 
supply, UHF lead, two cassette kads, :he 
Basic canri<lR«, thi in::viiiihlj dcmonsirat.on 
ca^sette tnd several b'joklets. These arc :he 
setlin^-up guide, the dcmorstraiion manual 
and the programming gu.de. The sett.ng-up 
gu de explains very sin.plj whai'* what on :he 
machine, so ihm the tcrnrs used in ihc oi!icr 
books wxm' mystify even the complete 



CONCLUSIONS 

■ =or £250, or £350 for the 128K 
/ereion due cut later lh s year, 
there is no doubt that the 
En-.Grprise Dffers the Dest value 
formoney in hardware terms. The 
Basic is easy to use and will 
appcol to Ihe beginner. Tc the 
Tiore experienced programmer, 
the completeness of the Basic 
will bs a revelat on — no more 
^eeks and Pokes. 

I They iwill olco b3 able to delve 
quite easily into tne depths ot the 
operating system due to the open 
nature of the system and its 
channel based archilevture. The 
hardvware buff hac aloo been 
catered lor wi*h the inclusion of 



the sound and video Unas on the 
expansion bus. 

Perhaps ihe only uluu-J on the 
horizon is the reaction of 
corrmercial software houses. 
Because of the revolutionar/ 
concept the machine embodies, 
it will take ilieiii titiie — and 
hence money — to come to g'ips 
\Aith the machine, especially if 
they want to get tne most out of 
Nick and Dave. 

Tnus EntCiipiii^t: may f nd itself 
caught in a Catch-22 position 
where commercial softwa'e will 
not be de(/eloped until there s a 
big user base, and people won't 
buy the nachine until they see 
that software is available. 



novice. 

It also explains how to load tapid software. 
This is ccrtaiiil;' a ^i.iipc process on the 
EiUi:rprise, you just h.t the button marked 
star:. To make sure vou get the itayhack 
volume right, thsre is a b;ob on tht display 
durng lotdtng, and if ihis flashes jrcen to 
red, the volume b c'lieci. 

As far a> the ccmonstraiion cape j:oe;., the 
projtrams arc hardly dramatic. But at least 
ihey are short Bas.c projjrams which w.ll 
actually itacl* you hov.- to write vour own 
rather than tlic d;si.Kiici'b piiwda-rishtcnce n 
JOK of mtchine cod: whicli teaches vou verv 
little. 

Finally we come tc the piogrammirg guide. 




which at nearly ;;30 pagei look> lliirSy 
caunting for even the seasoned vcierm. It s 
cividcd up into iluec seciions: getting 
acqtainicd, the tutorial and the refecence 
section. G;iting acquainted is the htandard 
begiiner's introduction, but worth a glance 
through by experienced programniert. ^t 
atccis ihc pa li bvivsccii (iiystificaiion and 
cnnccsoension very well. 

The ncxi sectioit iaircduces the cote of IS- 
Basic. It S(x;ncs a large amaint of lim.' on the 
structure commands, with plenty of examples, 
tut towirds lh; cud liihct glusics over several 
of the irorc incerening subjects, for instance .t 
tare.v mentions attribute graphics, 

So while tht beginner will have something 
to Veep him busy, aiyoiie ituere-ited in 
graphici mU be forced to pick u_> the dues 
t'rom the demc tape, or wait for the inevitable 
f.ood of "Get the most from voar Enterpiise" 
type bC'Oks. The retercnce section gives a 
comprehensive list of IS-Basic comntands, a 
glossary of couipuiei jiii^cni and a few nioi^ 
liinis o'n using saind and vision, Net a baJ 
efTort all in all. 

The lirterprise has t built-in word 
processor, whi;!! ilthcju^h rath;r crucc csuld 
.live on TippKx if your '.yp »ig is ii bii lUJgl:. 
It lacks features such as "search and replace'', 
block rr.ove or block delete. U is, htJwever, 
easy to use, with hclpfiil on-saecn prompt?. 
Another handy idea is that a listed Basi:; 
progran: bccouic:^ a ',vuid prucess.ng Hie, SO 
yau can scroll ap md down the whole listing. 
How nuny times have you let the 1 ne you 
wanted to edit scroll off the top of the screen 
and cursed this end-cf-the-world erfect? B 



4d YOUR COMPUTER. FEBRUARY 1985 




The rem erk able new Ferguson 
MCOl TV is built. on ttift fan oiis TX 
clidssis, Hu rujluntlly itoflers Oie b»SL 
in picture crioJity. 

But it filso fpntiirps DIN <!Ock^ls 
for direct RGB and Composite Video 
input. Wliich means every signal, 
froiri v'hatevoT source, ts • ransniittecl 
ciroct'y to tJie screen ivatliouL jeing 
denindnhtpd. 

The result is clsar to see - and 
hear. N o more fu/zy iiuages.No more 
cull colours. Stiarper wording andno 
hiss or hum on the sound. 

Unique automatic source 
swiTcMng allows ycu to plu j in your 
video recorder and any home com- 
puter with RUB output and leave 
Uiemsetup. 

Tliorc's no need to unplug any- 
thing unless y.iu went to carry the 
highly portable Ferguson MCOl 
aro".mdwitJi you. 



Aconip.iterraonitorthafsalsoa 
colour televisicn is the ideal second 
sei for Qie modern family. 

RENT OR BUY 

Andnowyoucauieiiloibuy Llit; 
Ferguson MCOl from DER. 

Rental costs just £8.9S a month. 
Fcr that yon gel a lead compatible 
with ycur computer and full DER 
service Or vou can fcuy the package 
for only £225. 

Simply fill in tlie coupon now 
and we'll arrange a free home deaicn- 
strat.on soon. 

The Ferguson N(C01 ."rom DER 
will help you to understand all your 
programs more clearly. No fuzz^ no 
bothsn 

Wo supply Idddfi (or Lh« folowng com 
piilers^ HfiC A «ntl B Acorr. Electron IIGB, Oric 
RGB. Lyiu RGB.Shcrp MX-711RGB. Dracon 
C/^v'id^o. Vic20C/Vidf>o, VirM, CnlMirflf^riP, 
S()rd-M5, Newbraia Atari 300 Canon MSX. 



|l would tike a free homcdoTionstration cJ | 
liie Fcryusori MCOl Colour 'IV/Cotnpuler i 
Montior. I 



Nan\e- 



I 



Address. 



Telepliuut* No.. 



n bnvG 



YC 



( prefer to rnnti I buy 

My home roMnpuieris: 

"ierd to DER, Homo Computer Depl., Apex 
House, Twick-^nbani koict. •■elttiam. Nlidcx. 
Von ^vill be conlacled wiiiii: 14 days of 
receipt. 



Ul 



.J 



Onlv'l manihmtviiK'r rc!)t<il rL'quired.Min. rental fi^rlcd I )esr.K<,'iAal(.'ust<xi^er: mLstlwlfi<ir o\«r. Crtti:* lULy vtry 
al DCR'> dJiicretlan. AvaOani^ in Gt b.-itAi i (niiuiltiiU onlyl. i>tl<. Aiex nouse, Iwictenli^fu Rooc. FeUtan. Midilsi. 



THAT'S 

DOES YOURS 
DO THAT 



VIEW AND 




Text is idham.Y sui:ed for niaiiipjlation by a 
niciopioccssor. Tht n phanimerk symbols 
iivolvcd an all be described by the perinu- 
uiimiii jf tight bits — one byie — and many 
documeius are shoricr il.an the 16 bit adcrcsi- 
iiig ciipabilly .)f the 6502 and ZHOCPl.'f. 

VJEW ar.d SCRIBF, aic word processor pro- 
jjranis for the BBC iiiicioannputcT. VIEW is 
i.ic udkial Acoi usofi proUurt snd SCRIBE .s 
distributed by Eiicon Ltc. in Swansea — 
Merlin Computer Prod.ictJf Bucon Limited. 
35/35 Singleton S:rect, Swansea, SAl 3QN — 
'I'clephone 0792 467980. 

A "won. prtKcssir" programs is conpa"- 
jitivtly easy to write m Bisic proviced tha. you 
limii yourself to a short text ind only e few 
facil:tie!>. 'I hese progranis arc often published 
ill campuier tnuijizinirs but really ouglu to te 
i;ui .i(U a difTeici.i category as they bear Utile 
riscmblanc to a professional pie.e if word 
proocssinu soliwaie. A gooc: wwdprocesior .s 
like a slwrj woodworking plane — unobtru- 
sive, cfTxtive, I'ersatilc, ready to hand and con- 
ducive ufj^uui. ievuk>. 

There is, howevei, no single best word- 
processor becinisc dilTcrent people usl" ":cxt" 
in entirely dilfertni ways for diflercni pur- 
poses. A journilist will rarely warn lo larellc a 
iJuL.ttuiciii bu^ei :han itircc or four t.iousanJ 
words. Conversely, the iasi of operation anJ 
the speed at which text can be entaed rnay he. 
tcrri:>ly important. 

The layout nf ihe printed ttxt is like y to 
fuiluw ;i siiiiple paiic:n. On (he oi.ier hand, a 



technical author, a merhflniral (•nj/'ni'<- o- a 
biochemist n:ay require more than 80 columns 
for the produc.iott of ublcs and complex 
Ibrinat controls to permit the mscrt»n oJ 
diai^rans, the representation of maiheinaircal 
synbols and refftri-iirt's in ftmmot-'s at :he 
bottom of the p:gc. 

A persoji running a s-nall business may wish 
to .ncorporat; ir.di\1duil i.ain;s itid addresses 
into letters, a:Kl :>iay want to rltei the contents 
of ihe U'.tf'r acMrd'ng to \vh.>ihi*r or not :he 
recipient has paid a bill recently, enquireJ after 
a product or made one of a number o'diTerent 
mistakes in filling oil rn t.isurancc proposal. 

You could wrjie one fropram that wou'.d deal 
witJl 3.1 these tasks f nrl sont- people have tried 
to do this. "Iiiie^raicd"softAvare pacliagcs such 
as "1-2-3", 'Symphon.'", and "Jazi" aim to 
offer toih word prcces&mg ar.d data handling 
in one package jo that ie.\i can h: mixed with 
ihf itNulis from :i spr^adslieet arjilysis, or 
merged with data frotn the built-in daiabjse 
program. 

but it iJ still v;ry difTiailt to make the park- 
age co-np'ehcnsi^'e and simultaneously easy to 
ijv 

i\ nr.cnu, br exa.«p;e, is * screen display 
which allows you a choose which operation 
the profitam should carry oji next. Menu- 
driven programs ar-: easy to use bu lend lo 
htrnm? irritating aflor some iim« as thj xi5*r 
becom;-s fanalia- wiih the range of options 
aviiilablc. Tl^s problem bccoiici piriicularly 
important when the computet is used with a 



Figure 1. VIEW Format rulets. 



F !> • „ - t < 

Produces text that lips hRtwRfln thft 1r«;)ngular arrsw margins. TIno computer t:eepc 
when the cursor passes the "b'". 



This rtler line shows a wider eft margin and t/,io tab stops. Up to 126 ruler lines can be 
se: In a cocumem; more tnan enotgn for ainost any purpose. 



Figure 2. Cnscreen capabilities. 










VIEW 


SCRIBE 








Enter text 40/80 






Wordwrap 


Yes 


No 


eels 


Yos 


Yes 


DN'OFF 




(alwiiyft Onj 


Enter text > 80 


Yes 


No 


Tab Slops 


Yes 


Yes 


eels 


(max 132) 




Decimal tab 






reotri? text 


No 


Yes 


stops 


No 


Yco 


Fill & Justify 


Yes 


Yes 


Lefl and Richt 






Right Justify 


No 


No 


Kia'gins 


Yes 


Yes 


Underline 


No 


Yes 


Refui tia. 






Page breaks 


Nd 


Yes 


oaragraph 


Yes 


■ Yes 


Set pags b-eaks 


N3 


Yes 


Globs! Forn-at 


Yes 


No 
(eutcmatic) 



"■'^,- 




serial tcrttiina rathe' than having a menio.y 
mapped displiy. 

It tube» longer to clear and then write a 
jcrejnful of iafoima ion on a ser.al tcrninil, 
Tt'oidstar solves the menu difTlculiy by jtlow- 
ing :he user tc chDOSc ar.y one of tour levels :)f 
help. A: ore extreme hal:"lh'i screen is taken tip 
with helpful meiiiugcM; nt he other, you arc 
wssumeil to know what you arc doing ar.d no 
messages are displayed. 

ViKVfr' can be used A'ith e iher a caiseite 
recorder, or one or two disc drives. It has matty 
attractive features und aomc itnpcriant 
dravba:ks if you use VIEW with the BBC 
micro set to Mode \ you will be able to type 
and display test r,s it will look on an A4 siv.ed 
piec; of paper. You will be able to held about 

,5C0 words oi'texi in memory it any one line. 
Using a 40 column display VIEW will hold 
iippioximarely 25,00) diaracters in mcmorv*, 
tbout 'l,Oi)0 words, becrciaiies :md other 
professional wore processor users will find it 
very diflicult to wtirk wiih ii -t(> .:olumr di.splay. 

Tie lop lint of the VIEW sceen is reserved 
for the 'ruler'' which sh>wi where the left and 
light n:arfjns arc set, the position of any tab 
jtops, an optional be.l signal, ;ind whether the 
test wi.I be juMtiled or not. Funher in:brni- 
;tion is given tbout Insert ''Cvcnvrite ihuJl- and 
Format mcde which .s aiiother n:ine for word- 
wrap, '.'he starling opii.Mts for VIEW are all 
Ji.\ed as the program is containec entirtly in 
ROM lirmwrtrc. Figure 1 3ho\v3 two lypioil 
rule' lines. 

SCRIBE usL-s a simiLir ruler line and is a 
ver\' friendly prc^ani which uses menus and 
messages to show the choices iliat are open to 
YOU at an_v .stage nf processing c do(.uiiit:iil. 
SCRIBE ii supplied as an 8K Eproii end a 
^0 cr 80 track disc hoicine a numbe;' of pro- 
cedures anJ utilities, Tc nuke sensible tise Df 
SCRIBE vou will need twj disc drives. The 
first, drive 0, holtiu thi: SCRIBE disc whi.c the 
second is used for i.ic disc holdi.ng the icM. 
You could manage with a single disc drive b.it 
SCRIBE does use the program disc quite often 
to call up editing uii itius such as "Reformat" 
Ki> y-.iu must keep your docume.-nr. orv :hc same 
cisc as iome of the SCRIBE proceduies, 



'"-^ 



M YOUR CCMPJTER. FEBIUARY 19f5 




John Dawson 

reviews View and 

Scribe -— word processing 

programs for the BBC. 



Dnjkc VIFAX' A 2.1 and many other micro- 
computer based word processors, SCRIBE 
establishes a ntmber of fixed rcrmii 'pages' 
w;icn you ucaie a ULCuuieiiL The pages aic 
laid out oil the ciscanc ymi fi.l il:c pigesasyou 
ijfpe. An HO ira:k single density dis;: wll hole 
lutwcen 55 and 60 A4 sizec SCR".BE pages. 
The enormous advjiiiuge oC :his approach 
ccmts vhcri you wijh to move biukwiiUs 
ihroi^h a document. 

Th: 7-iiii toiiuiiund in \'lliW is fine 
provided that vdu only want lo wor<. your way 
tlirougli the text from the s:art to tlu finish. 
Bit jPyinj li>rgL-i to carry out somt ediiiiuj o.- 
decidc that a couple of paragraphs will read 
\yenc.t f.-rlier on, you must sav; the hlocic of 
text on to (he disc, finish editinji; t!ie text and 
start all ;>vcr iii;aiiv friiin !he beginning. When 
you come ftjll circle you can set a narl;er, exit 
tc the ccmniand levd and read n the block of 
tntt fron ilie tiisc If the block is lonter than 
the Sparc c.jpa:;iiy in VIEW — about 1,200 
b;'tes in Mode 3 — you will have lo jhange inio 
Mod." / because VlliW s.ops reading from thi 
d.sc when the Vce space is full. 

T king .SriR IRK you can m;>vc lo any page in 
your text just as \»ou wish. Press fiinciion key 
n and liie proinpi lire asks '"I'xgc number?' . 
The up and down ctirsor keys wi'l sdec i\yc 
previous page or the next page respect velv 
after snving tlu' ciirrfiu pap.if to the disc. 

For longer repcrts, bcok chapiers, articles, 
essays and epic poerrs, ihis fadliiy cannot be 
ovcrtaied. 

If you warn to move beyond the adjacer.t 
page-i you simply enter nc •.ihvcilnic p:>gc 
number and ihi proKiam will move to ;he page 
you want. The number of the cur.'ent page is 
displayed c:>nstan ly i\ ihc top of the screen. 
There are I wo oil^r inipDrtrnt commandj that 
will repaginate the doc^1me^t, mnvin* i»vr«s 
material into or out cf consecutive pages until 
all is arranged corrccily. 

The on-screen cd.ting and display capa- 
bilities of the two programs fre shown n f guie 
Note ftiar this fv^iri refers to wliai ll:e 
frogram can co lo display text on the screen 
v,rhil; you are editing it. VTFW A 2.1 can right 
justily text, for exampie, by using an edit 



command but the effect car be seen only wlien 
you prjnt the docimicnt, either or. peper or to 
the screen. At this stage you cannot al:er 
anjlhing but must rviuiii to edit .node. 

The on-icrten capability of SCRIBE is very 
gocd. Underlining ran b<* sfvn in r^perrtttrtn 
although you must edit it into the texi at:er 
writing the doaimcr.t nther than being able to 
turn it on and ofi a* you go along. 

Using SCRIBE I miss the Shift curso." keys 

in VIEW' A'hich 4II0-.V y.ni 10 move <il'>ng j line 
one word at a linie. IIowc\'er VIEW w.ll not 
move ihe cursor to the right nand end of the 
previous line wlicii the cutsor reaches the left 
hard margin and this and <'iher drawbacks 
ucjle J litg^l.iig luudicap. Neither pfog.an* is 
perfect in terms jf the cursor :ommind}. The 
edi: faciliiies ire shown in figure 3. 

SCRIBE permits far better control of the 
priniec document ihar. VIEW. The Printer 
(liivui tjct.eiutoi progfiini that i» available :br 
VIEW does make use o:'iIk features in a rai.ge 
of printers but the cedes for cbtainirg the 
conmands, a.thcugh stpetficiilly easy to use, 
arc cltnisy for out of the ordinal^' functions 
budi di one auU a UuU'linc bpuciiiK. SCRI3n 



Figure 3. Edit commands. 






VIFW 


SCRIBE 


Move cursor by 






word 


^es 


No 


Move cur^ior jy 






pagc^ 


^es 


Yes 


Top/bottom of 


^es 


No 


text 


(sncrt text) 1 


V1ove/copv/de!ete 


Yes 


Yes 


block 




(limited) 


Recover deleted 






text 


No 


No 


Dfslfttfl wrrri/ 






sentence 


res 


No 


Underline 


No 
(printer) 


Yes 


Ma'kets 


Yes (6) 


No 


Swdp upper/ 






lower case 


res 


NO 


Search whole/ 






part 


Yes 


Yes 


Search ard 






replace 


Yes 


Yes 


Onpy cfinp! ai 






search text 


Yes 


No 


Merge files 


Yes 


Yes 


edit Oasic 






programs 


Yes 


Yes 



preMcoia you svith 18 global options tc clunge 
the format of the lex: or to switch between a 
serial and a parallel printer. 

Ouce you have established the condi:ion!> 
that iire lo apply to a particular document you 
ciT wv« tlKm wi-h tht: itixi ;)o thill ihuy will 
come into opcraticn vhen you xcess tic cocu- 
men again. You can alter ihc master disc to 
make the program boot up with a dilTereni set 
of default I'alues — a clever combination of 
firmvvun: in tlK Eprom ind aorVvvarc on disc. 



Figure 4. Printer format cojirraruis. 










VIEW 


SCRIDC 








Lsft margin 






Two sided 




• 


ofse- 


Yes 


Yes 


headers 






Top ma'gin 


Yes 


Ytii 


[Vxtuha) 


Yus 


No 


Bottom margin 


Yos 


Yes 


Set pace end 


Yes 


No 


Maximun print 


probably 


80 






(onsceen) 


v/tdth 


132 




Line spaciig 


Yes 


Yes 


Printer 


P inter 


Yes 


One and a half 






initialisation 


Driver 




spac nq 


No 


No 


Conlrol 






Single/ 






ch*aracters 


No 


Yes 


con.inuous 






Fedofiite 


P -inter 




she«ts 


Y©s 


Yfis 


Cfarscters 


Driver 


Yes 


Print part of tsxt 


Yes 


Yes 


Headers 


Y3S 


Yes 


Use form feeds 


Printer 


Yes 


Foolers 


Yds 


Yes 




Driver 




Aulcmatic page 






Change pound 


Printer 


Yes 


numbers 


Y9S 


Yes 


character 


Driver 




Additional 






Mai merge 


Yes 


No 


registers 


Yes 


No 




(limited) 


(datal:ase *) 


Multiple coDtes 


No 


Yes 









CONCLUSIONS 

■ 8ati VIEW anc SCRIBE are more 
powerfjl and easier to use than 
Woidwise SCRIBE works in nuch the 
same wav cS 3 con.mercial word- 
proces5or such as the Wordplex 
series. It is 9 (feliber^te, cari9(ul 
program wel suited to professioral 
computer users, that is people whose 
live ihood depends on not msKing 
mtstak's and getting work done on 
time. 

■ II you woiK under great p'essure pio- 
ductng snort docjments sucn as 
press releases then VIEW will oe 
marginally fastei to use. You must set 
agairis; this the ccntinuing errors in 
•hfi VIFW prrgrjwn sum an thR f qtti.rfl 



to recognise a fill f le specification. 
The do:umentation tor Vltw is quite 
lonq bit cjriousy incomplete. 
VIEWINOeX and tne VIEW P'inter 
Driver Seneralor program add to the 
faci Ities in VIEW but the combination 
of an Fprnm and disc in thp Sf^RIRE 
package is flexible and powerful. An 
integrclec database package for 
GCniDC will be on the market iwhcn 
Ihis article is in print. 
Both VIEW and SCRIBE a-e good 
woraprocessors and ycu should try to 
test both before deciding v/hich to 
buy Piobably I shall use SC=^IBE for 
most of my writing — crlicles and 
books — but VIEW is no bad cioice 
ftither. 



rouR coiyPurER, febrjary iqas ai 



TELEGRAM 




I?'^^!!^*^, 



The best simulation around ... A must 
for budding pilots " -P.C.N. 

"r would choose Doctor Soft's 747 . . . 
M Inslrunentatlon clear and unfuuy . . . 
p graphics are good . . . snooth ^nd 
§ reaUstJc" - Software Today 



:■■*% 



NO. 1 BBC FLIGHT SIMULATOR*, 747, NOW AVAILABLE ON 
GOMMOBORS 64 STOP SPECIAL 64K VERSION EXPLOITS 
FULL COMMODORE GRAPHICS AND SOUND CAPABILITIES 
STOP OVER 60 NAVIGATIONAL AIDS STOP OVER 12 
AIR3TELDS STOP EXTENDED GROUIH) DETAIL COVERS UK - 
N.W. EUROPE STOP COMPREHENSIVE PILOT WRITTEN 
FLTING MANUAL & CHART STOP DAY/NIGHT fi* VARIABLE 

WKMxn^B. wnvzs mx^ us vo:it y)WM n.^v:c^A!fid>'?' sto3? 



V-- ^- ■■ 



•• r -ftr-: ' ; * 



■• * ■:. '-~ '=— 



k^ 



;.■■• — -u ■ 






747 and other Doctor Soft programs are 

available from: 
I W H SMITH • BOOTS • JOHN MENZIES ' 
MOST LEADING DEALERS • BY DIRECT j; 
MAILORDER (SEE BELOW). 



ELECTRON 



COMMODORE 



'747 Is no ordinary Flight limulJtor, BBC 
owners know it as ttie program ttiat 
topped the BBC ch<irts montti after montn 
last /ear. 



Now for 19£5 The Doctor Team f Including X 

a B«A. Captain, Professional Flight Simu- N 
— later Programmert A A«rodynamists) ^ 

^ have produced this extended and en- 
hanced Commodore 64 version. 






«'^*' '"^H^ 







COMPETITION 





When we set ihc Compeiition of the Y;:jir wc 
lluiu^lil >uu wuuJd rnid ii u Jucdlc .V'osi of 
the qi3[>i^iinas cunt^iticd a clu« to ih« personal- 
ities who said th«m. 'I"he ohcts could be foutid 
by a prcccss of elimination Who else ■»« 
Attiin supremo, Hernmn Hajscr, could have 
talJted ahinjt lca;>rroggiiig Clivc SiiKlaij? AiiU 
sufciy Douglas Adams is the only one v*'ho 
mskcs jokes about computers. 

But only a .hird ofthe entries matched up the 
quotations correcily, ^^'iih nori people 
sn:niblin^ ai ihc secund q-KUi* iImii my tidiei, 
This was said about the Spearuni i:i 1982 by 
an unusually flippatM Clive Sinclair. The 
correct o'der of personalities was iS tiillou's: 
6,7,f, 8,2,4,_1, JO, 3, 9. 

Clive SiDcluii'si q^ip w<i> peilu^pb a Itlllc too 



close K) the bone. A lirge ni..mber ofthe quota- 
tions sabnitted as lic-brtakeni were ibojt 
Sinclair's cclays and the claim;d unrvliabiliry 
uf liis conputjrs. Paul Mumrr.ery, 4.S Wood- 
land Gartens, N. Wootoii, King's Lynn, 
Norfollt had the Queen waiting to knight Clive 
Sinclair "What do you m:an. Clive Sinckir 
tiug.it be t little bit toic^". T.iis wins him a 
VT?<-5i)0 modem lb.- hi* Spectrum. 

The best quote altng these lines canie frtxn 
K. Joughir, 32 Woodlca Rwd, London N'16, 
whf wins the Yamaha CX-5M for "Never 
deliver tt>duy what yoa can deliver in six 
months' time". Tfctfully attritutal 'o A 
Computer jVUnufacrjrer, we fell ihis struck a 
suitably sonorx)us and [xlhy note. A. Goodsell 
had the same idea expressed slightly difTcrenily 
and winj vi co:>y of .Melb.-iurnc IIovinc'5 
adventure program, Sherlock Holmes. 

D. Vt'alkcr, 16 Manor Gardens, Hunniatihy, 
'.'"i\«y, N. Yorks, ilniost got it right with: "So, 
Me.rion, wc ire agreed, Mr Walker of Mun- 
m.inhy will i.iki; ihc fir.M prize", attr.butcd lo 



tlx: hditor. '^'hu the Edi-.or actually sdd ',vas: 
"Mr Walke- sliall have a mcden". 

The othe" nodcm goes u> RRC owner J. 
WatnouKh, A 16 Hepburn Hall, Si Andrews, 
Kingdom o.' Fife, ScC'tlond who htd Herman 
liauser saying, "Well, Iujs anyone ran a pcwe: 
station with a ZX-iiy\ 

W'c awar.ied a day at t.ne cor.trols of a 
Rcdt:Tusi(in flight iimulaior to jVl. Button, 15 
Baawall Quidrant, Kdinb«iryh. Hit. iospiruiion 
was; "O Ronito, Romeo, whersfore £rt thou 
Roinjo — Silence, fiir mad, I hath nearly 
scored a tnillion at I'ac-Man". l' Aylin's quot: 
was "I never wir anytKin[! in th;:se bloody 
competitions". Not ia itself oiiginnl but w;; 
were toLched by his rather earnest "N.B. this 
can cnlyhc funny if 1 acUally win sonx-thing ' 
- for which he wins a copy cf Sheiloc< 
Kolr.ies. 

For the re:it, copic:. of Sliurlock Hclmto t> 
A. Karhjmiki, D. Tordofl, 3. AUa.i; and 
copies cf tlite to N Olner, S, Cunningharr., 
T. Hum, C. Fraser, F. Hatteit, .^. Furness, 
J. Ilammor^, M. Simper, arxl I. Dividson wi:i 
tbeni3clvc3 a binder each. 




rOUH CUMHUItK, l-tbHUAhY Idfli) 53 



INTO THE 




: 



WHKS CHARACTFJtS like Par Man '>prrng from 
the scricns uf the expensive purpose-built 
consoles lurking .n pub corners on )o hoiv.e 
coinjjuicrs ;vc:yone was utrazci. 

Bxk in 1977 if you wanted to play Space 
l.ivaderi at homL yovi .lad to bu>- a .O,"^^ 
monnclu-onie arcade ni3ns:er. 11' you were 
luckv you could even have toltur — dthough 
ihc conversion looked as ifit had been done by 
an over-enthusiast c Blue Peter presenier. 

"Well all you need forihis toy is -a hlMrl and 
white v:deo geme and thret strips, red green 
and Dlue, of soc-il.roLgh sticky backed plastic, 
juii sLici. ihc plasti: on ih; screen and there yo.i 
have it. Super. Next week Eugene will be 
showing you how to build yont own trifra-are 
house, and Cli.'c will tell yoJ how to deliver a 
micro within 28 days GreaL" 




•\nd \;'hen you finally dred of 2apping 
invaders it would cost yru another /".1, 000 to 
change to a difiere.it gatttc. Within two yi:ars 
most arcade games make the transition to the 
home mi:ro often bsing Uitlc but price on the 
way. .Viachiiieif like Atari's £130 liOOXL makes 
a surf rising!/ good alternative to pumping cash 
into a coin slot if yoa want to play Pole l-osition 
or Pac Man, and you can have a whole library 
of different jjaircs for 3 few tens of pounds. 

So if 'AHi \%ant lo loox at the action games of 
the ftimrc for our home computer} the first 
place to lock is i.jday's arcades. Obviously 
adventure garner which miy tike hours or tiay.s 
to play aic d-;ve.oping faster for llie home than 
they jre for the coir: mucl-incs. There the 
operators are looking to make a .~asi buck. 

Even so, the jrapliics are iiKreasirgly 
etr.uiating those of their ar:adc c<;usins, -JesDite 
the advantages that custom video circuitry 
gives the slot mucKinec. Often they use the 
sanie processors — Atari's latest System I 
mjchinc for instance which is ir.iroiucing 
Mjrble Macncjs to windswept seaside p.crs 
and unswept motorway serv.ce areis around 
iht country b based aroutid iMotorola'i 68010 
— I chip ofi'ihc iame silicon block as the 68008 
in Sinclair's ■ 51.. 

Even the technological edge which laser- 
based games such a> Fircfox ind iMich 3 have 
given the orcudt.-.H i;* iihoiic to be nibbled ;tway 
by the likes of Pioneer with its MSX micro 
plus laser dijc home system — Y^tir CoJipuier 
Dcccnber 1984. T.nc ?io.Ke: will come with 
the relatively crude Sega Astron Belt which 
launched the (irjt wave of laser ilot m^hittu^ 
in 1982. 

Asifon Belt usid i deliberately degraded Star 
Wars sty e background film on video in the 
hope tlui the relatively cructe compu'cr- 
goncmtcd profile of a apaccihip N\hich you 
guide to chc de^th ;tar would not appear lOo 
art.ficia!. Its succe&s.)r,s had diiTerem strengths, 
Atari's Firefox pu more clTori into the 
coinprter animciion whili Mach Vs appeal 
stemmed from its power to convince ycu that 
you rally were -natioeuvring an K-15 hurting 
over the tret tops. Even if you ocasiondlv 
wondered how the enemy tttack Jielicopier 
managed to fly Ixick.vards at 530 miles an hour 
ju5. so y4Hi could get a clean {hot ai than. 

Eut the latest gcreratiot! of laser genera.ed 
car:oon games — li.<e .-Surer Don Quixote — 
wojld make Manna Baibera droo!. Yau -ran sit 
anc watch the enteitainmtnt rather tliaij play 

ytnirfidf OC Q WOuld be wiildinill tiltcr juidcs 

the Den past hazards new fencing ofTgitnts or 
skipping from rock tc rock to avoid being 
swept offin 3 flood. 

Unfortunately the graphics have fottietines 
oviistripptd 1 ic ibilitic* of thu wiiicis it make 
the games challenging. It is .^asy ic see why 
Minoru Arakaura — the American President of 
Nintendo; one of the Japanes; compades 
which has been jt the forefron: of arcade cntcr- 



It seeaiti that what 
happens in the arcades 
is a good guide to what 
will happen on home 
micros. Meirion Jones 
investigates. 



lainaieut — &ayb "tlictc arc no real games on 
laser yet; it is jwst a matter of reflexes and 
liming. No skill or straiegv on the ptrt of lae 
player s involvec." 

But tncn again Nicitendo hat no laser games 
of it& own ao |n:iliap» im iusi sour rice c-n his 
part 

It will be a long time if ever before hone 
ivstemt can hope lo con)(x:ic with ride^ li.<c 
Doton'i "sw;ar-yoi-are-therc" SR-2 which 
boki Ike ii K]U4shed .nir.ibw uti liydiiulic 
rams bat '& actudiy a sophist iL-attd simulator 
designed for amuseiiijnt parks and bij; arcades. 

It wai demonstrated for tie first time id this 
ct»untry at the January 1985 Atiustmetit 
Trades ^.^h^btliulI Imeiiiaioruil at Olympia. 
Up :o a dozen people can ta<e their scats in the 
SR-2 and A'hen the doors closi and the front 
5crecn liglus up you soon lose <jny feeling tlat 
you are watching a film as the moduk you are 
in i>i;ii I? CO lip :uiU swjy lu complete the ill jsion 
of motion. 

At the show a tunch cf sober suited, cynical 
sales executives joined me for what was billed 
as a roUer-:oaster ride on the SR-2. F.vetyonc 
was suitably impressed but ur.enthusiastic 
whe.i the simulator .ipped 4'>'' backwards as 
the frof.t v;ew sluiwcd the f rsi slope when the 
roller coaster was cranked up. 

Then aft.*r reading the top wnd starling the 
long d<::>cMU ilie ^pecd \vi:h which Ihc 




YOUR DOMPUTER. FEBRUARY (985 



L 



RCADES 



/ 



i: 




hydraulic rams wcx able lo tip us backwards 
and forwards and side 'o side as w; went 
throuijh ibc Jips and Ivnds shook ever\'Dneoul 
ot thtir complacency. When we huriicd into a 
shadow tnd out the other sidt to find oursdve* 
flying free over a river ihcrc were 1 1 gasps and 
3 cry of "Tlnly smnkr" frnm an alarmed but 
polite mjddte-agcd American. 

Even tnort startling wa; the run djwn a bob- 
sleigh ircck which f(ill«wcd ii — nov we coulc 
undeisiand '.vhy thiy asked us to wear ssatbclts 
as rhr rahin 'iiiakcd frnm side to side throuuh 
the icy bends, bcicrc emerging on t race track 
in severt: danger o:'cr.ish-ng tnm a Porsclie. 

This first SR--' in this coudtv will go to 
Bicton Park in Devon — there ari al-eady a few 
of :iTi crtrlii-r niodp in plsres like Blackpool — 
but if you want one of your »\vr. I am afraid it 
will cosi you ;.80,O00'p,us £1,200 for cvcrv 
new filnr, and software madutc you iirccr. 

Money is the name of the game fot ar;ade 
operrtnr'! and Paul Moriiriy of Taitel. ore of 
the biggest disiribuiors of machines in Britain, 
whicii crigjnally brought Space Invaders to 
these sh.lrc^ has to decide which of ihe many 
games he is ofcrcd will be ihc winners. In i 
typioil week he mj^h: gel three di.Tercnt new 
arcade gam«, cften from Japan, .vhich coirc on 
iniercharigeablL circuit boards c-r discj if the/ 
are for tlie lasers. 

Tie boards arc sluing smaller all the time — 
ihc tait'si bfiirh is notfhook sized. All Jtiu have 
to dc is jiot one in and chjng;: the labels to tur:i 
your Pacman machint into Fac Lard. Tht TV 
screen :s oltcii en a turntable so you can 
convert the ccnscle :o an upr.ghi geme like 
r.rnvn rrolf in seronJs. 

lit tries them out a; a number of test sites — 
[he list is secret and the places arc rotated as a 



pre::auiion against piracy. If the take if good, an 
excjptional nt\v Rati.e can lake as mu;h as iSO 
a daj- on one machine. Then Taitel w 11 buy .ip 
to 500 botrds in one go, and a: £^00 to £700 a 
hitaid hai CdU be » lot uf luuiey. 

Piracy poses tie >amc sort of prcblems as 
ctstwh.:re iii the computer industry. In the 
eary days the proJuorrs were naive abt'Ut 
cofyin? tut now every board comes with a 
sccjritj? chip — although it is only a maiicr of 
[inx befoie that is broken and then copies are 
produced by the thoxisand — often made in 
1 Ta.vvan. When the locciions of test sites h::ve 
leaked out, says Paul "it has been known for an 
employee of anoiher firm to go ii: and rob the 
board.' 

Ar l?asi l3?cr-disc bised games are mtch 
more difrK-uli to copy by like many others in 
the business Paul still bis his reservaiioas 
about them. "They have to be m.tde cheaper" 
he says and with price tags of £2,000 to £5,100 
for a complete laser jystain compared with 
about £I,30C for its coiiventionil equivalent 
you can s;e what he means. 

Madiines are gettins bigger — 5cga*s OP 
World hai two TV icrcens, Atari's 1 X- 1 three 
— but not necessarily better. P;iul's ovvn 
favx)uritc »ame is still Qix whirh he thin'%s was 
ahead of its time "they should rcrclcase ii 
now" but he ilUiiki that :he newer "conven- 
lio:ial games are getting as go.)d as lj,sei". 

He can point to ^ames like those shown on 
this spread — Pac Land with its cirraon qua ity 
graphics and Future Spy which takes the 
Zaxxoci idea a whcle step further. niaJiaior, 
also shoTvn, he k less enthusiastic ab>ut 
because despite some very good graphics m 
chariot racing scqucoccs it is too iiuch Idee the 
racing games which domimted 1 984'i O ympic 




2&4020 



1450 



£ 



mm nm 



T=T 




G.imcs like Track and Field unc Hyper 
Spo'ts A'ere astonishingy successful but they 
caused their own problems as consoles took a 
hammerinj- from woald be sprinters and long 
jumper*. Tho<;c compunii's rh:ir opicfl ft\r ihi* 
joystick rather than buttons to cont.'ol what 
was haopeuing on screen soon realised their 
mistake as the slicks lo.ik a yjar's wear in a 
couple of wee.<s. Sometinus the sxaii can be 
too much - in tK- <a';r' ^fRiirfc RogtTq "'iiitrl 
eveniually had to fit £103 cast iron joysticks tO-, 
take the puni$hm:nt. 

iV.any oi the latest Japanese ganus stress' 
individual combat — like Punch Out and 
Karate Ch-imp II, while tiu-ins with I'llrtiK such 
as Indiana Jones tnd the Temple of Doon and 
television scries ire still popular sources f:>r 
inspiraiion.H 




PMM 



ii^HMhAi^ 




S^ltCi] 



t*4 



ii»IA» mi.mun __'.«ty> 



YOJR COMPLTCR. rCDRUARY 9DC 55 



PINBAT 

WE HAVB TRtED If: rrafcc a game ihit .s An exainp c will ma.<e ihis cleare:; Look at p 



diirereiii i;) iraditional Pinball bui which 
retains :he feeling (hit d^ill onJ ii:d[;mcnt, ta 
well as a certain amojnt of luck, arc all 
involved. Machine code is usee for arimalion 
cllccis, sco-e display and the bats, lc;vini; all 
ontrol of the "marble" in Basic, biit using an 
array system to spcuil things up. 

As with ;)iir other ZX-81 piogram^ nearly 
everything is done by direc: Poking anJ 
recking, tc and troni li.e ZX-3r$ charixrici- 
mapped screen memory so evcrytiinj in the 
gimc 'uctiiLlty esiits' on screen* not just as co- 
ordinates. Noic that the Dtmo mcvdc runs at 
about bi If speed. 

It is fiossiblt for the marble -.o collide wit'i 
any of 24 different tji^es of object — left wail 
charactersj right woU, g<iiv:i> btts, etc. — and 
in most cases a different routine ij needed to 
provide u suitable reaction, such a» a rMuincc, 
a bcnus, a special effect, etc. The most 
obvious approach is to use a series of If . . . 
Ihcn chec/.s lo -lori out -A'hifh object ih; 
irarblc :ias hit and si which routine lo call, 
bit even in a fas; Basic this would giv; an 
uneven response ani a nmiceably 'sticky' 
bounce sf the marble. 

Ptnbai UKft: a more structured .ly.tcm, 
where the coccs of the charuL-teis that the 
marble hits are leac d.rcctly from ofl' the 
screen and used to slice out indiviJual 
elements from an crray whicn in turn contains 
pr(i-a>-rtingcd line nunibcin to Goto. 



line 40; X is the marble's po&il:on onscreen, 
so X f DI — ditcctioa — is I le iriarble's next 
intended position, ind the Peek of this gives 
von the character that the mirb.c is about to 
"hit". 

Nov assume that tlic marble aas just h.t a 
'minuj* diarjctcr. The SiiiLJuit Code f.>r this 
character is 22, so the 22nd element of the 
array ;I gets selected and ihiscortaios t.ic line 
numbir cf ilie rcqu rec: ro.itir.e to Goto in this 
case the "lo5» marWe" routine a: line 470. In 
this way \h^ jinjtlc line 40 can branch directly 
to all the ncces-iarv rcuti.ies. most of vvltich 
will then go back into the main loop. 

Line 4280 specifies the line numbers 
associatcc with each of the charariets that ".he 
marble cc-ulJ liii, aud is a hardy reference. In 
prictice, all the array subs;rii:ls tre shifted up 
by on; — bv line 4S0O — because Sinclair 
arnys do not have i wro element. 

A little ex;ra planning-ahead is needed to 
tniiiiitly fill up ilic- Gulo aiiay with the correct 
line numbers, but ihi advantages arc m'>re 
than worth th; trouble. The n'.ctlwd is 
practically independent of the number of 
choices to be made, and sc coald be ixpanded 
tvvji tuidicr w I htm I los; of speed, but at 
present aniy Sinclair Basic allows this 
particular ivoc of computed Goto. In soimc 
ways it is more jxnwerful than an On Goto 
connund. 

Nuie ih^i i!ic first elcme.tt of il.e Ootc array 




coniaini 10, so thji when the tr.arhlc is hittiig 
ChrS zeros — i.e. travelling ilirough empty 
spaces — line 40 ^'ill Gcto line 10 to continue 
thi" tn«in loop Also, ms ) safety precaution in 
case of typing errors, all those eletncnts cf the 
Goto arrry that cor.'espond to unused 
characters have b:en given a defajlt value of 
'160, so that 'v. the narjle hiti something it 
^Jioiiidn't, say a scorc-dig:t diamoicr, then 
line 40 branches to line 160 wiich prin-s 
"error" and stops the program before ll;e 
marble can plougn on through addresses that 



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56 YOUR COIWPUTER, FEBRUARY -986 




Dave Rogers and Colin 
Hogg challenge you to 
beconne a pinball wizard 
on theZX-81, 

shouldn't be Pok^d^ 

Tiis includes the ZX-8I's dreaded Nevlinc 
characters, luikiiig unseen down th«, side of 
the screen, ilic Aiking ol wlirch invariab y 
results in irreirievablc crashes. 

Som«thinK «lsc ihal can'i be se*n cnscretn 
Is a "chaiacur 90'' just abcve the launch 
charjnc. h is Pckec tlKre by lite C'70 — it 
can't be printed — and it i* not seen because 
there is no bit-pattern for it in the ZX-81 Roni 
io ii jiitt looki liJc a space charaaer, but it is 
used here as an in^isiMe rigger. When the 
marble hits it then line 40 branches t« line 
440, printing a '.id' over the launch chmnel 
10 seal it off, 

L:ne 230 looki odd, hui it is the shoric«i 
way of selecting one of nine difTerent 
directions at ranioru, Ity using t.ie Codes of 



vatioirs ChrS sliced out of a sfing lo yi;Id 
values rathiT than doing r.i1r)ilniinn<; 

Note that wlien any of the madiin;-<ode 
sub-routines return lo Basic their value is 0. so 
wherever you see "+USR'* in the fstinij this 
is ust a ihori way of calling a machini:-cadc 
siihroutine, it docs net afTea the :iumericai 
va.ue of whatcwr calculation it was included 
in. 

Usr I65S4 Scmlb" scrcet. lire 22 — cclutiins 
1 10 28 — sideways by one space, with wrap- 
around — thiS raovas t.nc various bats — eiiher 
under Inl;ey^ control when in play tuode, o." in 
response to an avtotrtatic mutinc when in 
Demc mode. All ths otlicrm-:ode subroutines 
rciurr. to Basic via this b£t-ntove routine, 
ihiTcby fivinf* more cmtinuous ba ctxitr.il. 

Usr WSmVsr 16608 (Siparaw entry points 
into the abov; routine). Scrolls line 22 
lett/ri^hi rcspeaivdy. This is done siurply by 
swapping adjacent pa'.rs of display file b^tes 
aivl neit mrtvin}^ in sidewafs incrx:mcnts of 
one, repeating 28 times in all. Wraparound is 
achieved automatically when using his 
method $ma> after a complete line of swaps 
th; line isel."wtll have moved one way but the 
end character will Havi* Un-n 'hiu-<i-i- 
brigadcd acrosi to the oppos.tc end — work it 
m;t! 

The "jutoba." .-ouiine starts at 10536. It 
scins the screen to Hnd the ha and the 
marble, works nm ih(»ir rf'btiv rnlrmn 
positions and then calls whichever of the 
above scroll routines n needed to move the bat 
to catch the marblj. 

Ust /6'0'WSccns ;he screen (ltr.es 4 to 16) foi 
"astrrisk" anri "piis" .-hnrarters, and 
w.icrever ore is fcund swap> ii for th; t)ihct 
giving ar animitioi efiec. The next time it i< 
called It will swap the charaaers back to t.ieir 
originals. 

Iht tatififi As nhcwi', hir tcstva Vm Ifft and 
right brackets characters. 

Usr IC'G9S Same again, bit for characters 
whos-: Codes are held m addresses ibtw nnc 
16691 i.e., rcdc.mablc by ?oktng those 
a<ldrrs<;i>; 

UsT JC63& Adds one to the score (which is 
held in a permanent store area, >ee belowi 
then copies thi* in'o tie scrc-jti. 

Us,' 1€652 Copies the score onto the screen 
but without adrfinp arything to it 

Poke 166S0 Sprcinu between digits when 
score IS copied onto the screen. 



16734 to 16740 Score store arua. Before each 
game, lines 860-880 in the Basic reset thcic 
bytes to "zerc" characters. 

Frsi enter 'Faxt' mode then type itt, as line 
one. Rem plus exactly 230 ufaiiy (.liaiuLicis. 
Now type in the whole listing a.id, resisring 
the teinpttlion to Run it straight away, Save 
and label two backup copies!! 

When frst Run, the machine code gets 
Poked .nto ths Rem and is sum-dieckcd as ii 
goes in. Having corrected Any errors, as 
indicated, and chcckcJ that the program 
works, you can then erase all lines fn>m 7000 
onvrarcs and Sav.' a few working copies using 
ihe Aumsave (gino 3D0O). Always Clou lefuie 
Saving otherwise yen will Save the array on 
tape, making toacing unnecess-iril/ lonu — i.ie 
arrsy — is Ik :n actual size, since each number 
= 5 bytes — also select "slow" mode. 

Please ciiecfe cfrefjlly the following lines — 
"gas" indicttcs characters obtains using 
jraphic mode and Shift; All erevs are EsH. 

230 gsW. gs=1, gs6 inverse 7, 8, 

9, keywords Code, Val, Len, 

Wo tjxtrt t>pac(j5. 
960 inverse tight b'acket, 30 

spaces, inverse left bracket. 
37C inverse left bracket (gsl). 980 

gs2. gsR, gsH, gsW, gs-t. 
2460 (all irverse) Q. - . Q. Secord 

string, Y. 
42£0 (This Iin3 is so importart it 

is chacl<summed), gsQ, gs7, 

gsW, gs2, gsR, in/erse f, 
inverse 0. inverse space, 
gsN. gsJ, gsM, g»r, gsG, 
gsH, gsO, gsl (rest are 
normal characters). 

1010 gsF, gsJ and inverse zeros 

are used. 

20^0 one space DelA'ecn the 

brackets. 

4090-4100 gsN and gsM are used. 

44 "0-44.30 {jsD ^nr gsfi Pirf« iisflri "ypfl 
exactly as shown, some 
words 'contain' marbles fo' 
uae on their acrcon. 

51 "0 2 inverse spaces, inverse 0, 

2 inverse spaces, inverse 0, 
Inverse sp&ce, 7* ysF, 
inverse space, inverse 
'hogfog'. 7' inverse spcces, 
gsJ's and gs B's. 

440 irverse left bracket, 2 

irvfitse spaces. 
When playing, use two fingers of one hand 
icontir.ued on next oace} 



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(continued or next page) 



YCUR COVlPUTE=1, FEBRUAnV ^OR'z, h7 



(coniinued from previous paget 



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(continued from prevlots page) 
rather ihan two lands, it's ruuch casitr to 
control the bate. 'I'lic wnpaiound can 
somctiiT.cs be ustd lo advanttKc to quickly 
reach marbles on the opposite .side of th; 
screen. Vou score points by hitting stars or 
rollover tar,^cti — inverse numerals. 

At sidcwjlls iliL' mirble cbuya simple bws 
of reflection, but at Jtars or g:cy blccks the 
irarbic gets thrown oil'ai a random angle. At 
"triboosicrs" llie marb'.e is dene.-ied 
whichever way the iribooster characters are 
pointirt); a: the time, and then a iiev 
tribojster, of random type, gets primid, thi% 
bcinjv essential lo prevent the msrble from 
ever getiini; stack in an hinniicly recurrinu 
pattern of bounces. 

Phvsicistc may like to note :hai with fe\* 
exceptions :narblc mMion is assu:ned to be 
Newtonian, fri:tionle>s, perfeeilv elastic and 
in zero gravityC.). 
Main variables, 

H.;N) 'On Hit Goto array. 

X Position cf marble on screen 

(start cf dspay file plus an 

offset). 
Dl Direction of marble — 1 = 

light, 33 = down, etc. 
Mi Messages and N^arbles Rack 

M Pointer, keeping track of 

progress alono MS. 
BS Bats. 

SM Screen number. 

DEM npmn mode if set to one, 

Play mode if zero. 
DS Demo select, input by 

player. 
ANG Angle of score display. 

P$ Printing strings. 

SJ Screen storage strings 

D, A Down/Across printing co- 

crdinatss. 
JDR Undefined variable to stop 

progran on errors. 
'IVppd rcpics of this program arc av-ailablc for 
£2.50 from: 

1 1 Carnarvon Road, Walton, Liverpool, L9 
IV.li. the cassette aho includes two of uur 
other ZX-81 ga.nes. 
I jnB-hy'line. 

7 Nev.! diteclior is 33 or - 33 
to 'channel' marble straight 
up Of down. 

8 Reverses the nev/ly pic<ec 



10-40 



50110 



13C-150 
16C-19a 



200-280 



260 



290330 



420430 



340-390 



i00418 
^60 



direction ir the case of the 
martte hitt ng the channeller 
diroctly fron undarneati. 
Main loop. Line 43 i$ 
particularly efficient (see 

tbXl). 

Ttibcoslers. Three entry 
points for three different 
tr booster directions, bit a I 
return via 110 which prints a 
new tritxjostei of random 
type over the old one. 
Dropgates. 130 swaps 
characters 137 and 138 to 
animate ga:e. 
Sidewalls. Simple laws of 
reflection are obeyed e.g., dl 
left wall, if collision is in 
soutti-west dtraction then Dl 
= 3k, reDounc is south-east 
with Dl eqtjal to 34. 
Flingers Marbfc is throv/n 
oil at any of eight direcliors. 
To choose ".hesc at rancorr 
a string is sliciad whicti 
contains characters that will 
yield the requi'ed nuTibers 
— of'.er 164 remoi'ed from 
thsm. 

If chosen d rectioi takes 
marp c into a clear space 
than go oack to mair loop, if 
net, then stay n flinqer 
rojtine until a clear route is 
chosen. 

Rollover laroflis I inp ."^lO 
peeks the character and 
adds one to it thus 

Incromonttng tiC rolloyer 

number each time marble 
passes cvet it. The 
bidcKeied function resets 
nines to zeros. 
This caters for the 
occasiors v/hen the marble 
hits the edge cf the score 
display, causino the marblR 
lo run diagon^ly across it. 
Bounces of I bet. Bats ars 
made from Ihreo ciffcrcrl 
chara:;te's, each causing the 
marble to bounce off at a 
difterciil citiyle. 
Bonus rcutine. 
Stops the prog'arr if ma-bte 
hits an unspec tied 
ch3ra-:ter, this especially 



440-450 



470-492 



600-620 
63a-t)bU 



692-696 

700-800 
730-770 



800 820 
860-880 

900-992 



1000 1070 
11001160 
2000-2480 



3000-END 



protects against Yewlines' 
be ng po^ed and causing a 
crasti. Program is 'outed to 
this line oecause all 
unspecified elements of the 
Goto array are 'illed with 
value 46C. 

Prints "lifi" over launch 
channel when narble hits 
the — invisiole — character 
90 present onscroon juot 
above the chamel. 
Marble lost. "Twinkles" 
marble wic-it; it iiil thti 
baseline. 
Start new marbie. 
Moves th3 string MS, which 
contains "messages and 
marbles" across the bottom 
of :he screen until eitner a 
marble character is detected 
whareupon tho 'roady to 
launch' routine at 680690 
operates or: a fullstop 
character t& detttuluU, wtitch 
is use j as a triggc- for 
jumping to the "next 
screen" routtne. 
Slides a gate open at top of 
launch lube. 
Miscellaneous decisions. 
Game-over routine. Calls all 
fhft anlmftloT scans at once, 
until player decides tc play 
again or go into demo mode. 
Demo docioiona. 
Pokes '"score store" bytes to 
character zeros. 
Draws over and theretry 
erases old screen with a 
nev/ one. 

Select diflereni strings 
containing draw instructions 
lor scmprs 1-fi 
Exfacls print co-ordinates 
from strings and passes 
:heso to crav/ sut>rout nca. 
Draw routines: 201 draws 
whatever s in PS, 2030 
diaws a ■'vlitniieller", 2020 
draws a "'olbver target", at 
2403 there is a separate 
'ou:ine to draw all of screen 
3 — bonus scresn. 
^utosave /Initialisation/ 
presentation screen/machine 
code data, and loader. ■ 



58 yOUR COIVPU'ER. FEBRUARY 1986 



ORIC JOYSTICK 

Suitable 'or use witn Commodore 64, Vic 20 and Atar 
Top Fire Button find Sidft F re Button Fost Action 
Interfoce for Oric 1/Atmos 
Interface for Soectrunr ZX8' 



£9.95 

£11.50 
£7.95 





TRACKBALL 

Improve yoi-r sco-es and skills with the Compuiek Trackball. Suitobls for 
use wilh Commodore 64, Vic 20 and Atari £17.95 

Interface for O-ic l/Atmos £11.50 

Interface for Spectrum ZX81 £7.95 



COMPUTEK JOYSTICKS 

for use wit-i the BBC Computer. Mctcl oha-t, 2 fire bt. ftcns 



£12.95 





PM CT6 CASSETTE DATA UNIT 

Designed for use witi Commodore +4, Commodore 64 and Vic 20. 
This cossele unit is a device for storing and recalling compu'er 
programs on o'dino'y ccssette apes. If can be used for saving 
programs you hove writ-en aid v^/ant to recall for later use. It car a so 
be used to read pre-recorded programs thai you have purchased. 

£24.95 



DUST COVER 

Clips onto the back of the Comnodore 64 Pivits jp to allow use of 
keyboard, fully moulded, clear plastic dust cover. £7.95 





TRADE ENCUI9IFS WFICOME 



ORICATA/OS £125.95 I Pieosesen-d rr.e the fotbwng 

I lencloie my cheque/P O. mcdepayatle lo; 



ORIC DISC DRIVE £225.00 | 

I 



I MICROPRIOE LTD for £. 



H/KMi.. 



ADDRESS . 



ORIC PRINTER £129.95 



ORIC MODEM AND 

INTERFACE £99.95 



' AL. PRICES INCLUDE X>STAGE 8 PACKING' 



■ MICROPRIDE LTD. 

I VNIT 1 6, SHIPTARP INDUSTRIAL ESTATE, 

, BRIGHTLIMGSiA, ESSEX C07 GAR. 



YOUR CDM31ITFR FEBRLARY 1985 59 



The ELustrator 

is inrnunent 



New you rnn add graphics to your 

Oiiill Written Adventure. 

For use in conjunction with 

The Ouill Adventure WritingSysteni on the 

48K Spectiuiu. 



%<■ 

Please rush nic ;tii jrdcr form nnd full detailsol 
T\\t Illustrator for the 48K Spectrum. 
I enclose a stamped addressed envelope. 

Name 

Address 

YC2 




3€ Hawthorn Road 

Barry 

South Glamorgan 

CF68LE 



THE VIKINGS 
ARE COMING!!! 

SWESCOT are proud to announce that v^e 
Vtflll soon be releasing several top quality 
progrsmmes on the interrational market, 
made by some o1 Sweden's most 
proficiert programme's. 

And best of all PRICES FROM £1.99 

Du som bor i Skandinavien och soker bra 
program till din hemdotor. 

KONTAKTA OS!!! 

Vi har det mesta som "inns i denna tidning 

till j^am/na laga priser som gallor i England. 

Dessutom far vi in alia nyheter samtidigt 

som de slapps i England. 

OBSH! \/id katabgbestallning v.g. medsand 5:- Skr 
i frimaiken for portot. 

SWESCOT 

Box 213 

121 02 Johannesho^ 

Swedan 

08/39 27 00 - 08/81 18 Dl 



ORIC AND SINCLAIR 
COMPUTERS 




turatwlii *Ml <■';! rn*8: tIM Orw colJu' 
fill iflOA) en; s«Ki«*! Gsieiiun Haa 

toneuUl llfci: ItXIl V'B/ Sin«»4r ql 
Cooro'ff 1«6 Ct:*i) (*1C' S<tv;uii !jci«cliun 
4»K tij fi\3n £1*3 ^(KiiKthiT rf I ({4ft MO 
KSi3i lr:#ilKc 1 iU fiOt i&) iiMciil n('<ir 
Mw. mi)»u> . inii«<r.vn 1 t 4 <-«imi<».ii t OS 
(ttOOg ECO, Oanii mcaidRvi cMiW;^ HflO 
CWi £7 Sfar*vil (kifcy et$e liiettoce (of 
SOf-t^fWl tlO (li^S^ fl? !>«<) CiiriBra dSC 
SIC •or 'ot uila:::^ *>€ di«*si Ful«f R)3 
xin«93ni «CM biwifiim vsi iitJl t«s f'ui*' 
nvKIci irn fW <f >6t £32. Irlerlace 7 t"2C-«5 
ItJO l'?- 32< mfincf upt'-Tilc >i(I re UK 

se«:t(vni ()«ic« 2 3na i oityi til it7J); tm. 

3m:Iiu<ii CmlrDnif! rvf nliH ni*ffK-^ «> t<<A 
£5J. ZK prfner t« :«*f (ei:lKc<l By n* 
Al^ilacnri M Ut Hfy: VEi 'j fimtii rols (IU!« 
wkK<li«rSinclM''Oi AI;^lir.crtieiA(tieK2l ZX 
caTtv/UH t*i (4«!C?4. IbK rin pic^t bf Z>8I 

COMMODORE COMPUTERS 

Cofltfiucorn ;>lul'< CSC! \ili\; £301 
<::o<T>ne<lc»e 6* EJZ! >:E2;3; t335 Rnnv*iw 19 
;ril[Mi mn^ ly^iiyir&tt canexxtr rMiOI3i'i\o 
on i.«W tun tfe v^i ^ ;ni1 it-p Ccixnodott M 
f9ff 1(9 CI' Gv^n fic^ase itouMe 
COOVtftOr T CKIl^ilillU: r.-lSHTte »C«<llet 41? 
1(341 CM. Conmxsfo :asM<te irjonM CO 
(E«4* £S0 >>iHtj« ma-latti (<• VirJO »V) li« 
Comx«<ia-o e* Cer ie«'.'»a C4! s£4ti t4« nse)J 
tiS tU« t46 0>5C WW a33:«09 E2:>".. I5!0 
P<rnttifpla<«' ties £149|CIAC U^jAOt Ptlitir 



ACORN COMPUTERS 

CtKimi U)i iCI.'QTt tm DOC M09II D t«CM 
lC96r>t3ar. <«n4« a»Ui; .iiroUi uijh iMi«iiace 
By(i1«itituO<tlJI)Cttt $(• Mt»w rci mil ah'e 

CJMANA DISC DRIVES 

Toiull tiM. iDliiilinR:! I)* S>n:ialr Spochum. ilBC 
HiU VWoojenie Sicjl* 40 Ir.nit ilnrji* jtctd 
tl?» (Oftd Cl/8, 40 iKk ilau»Ki MJ-iiJ -raifl 
|£I4S> Un.W tiMk tinoh »l<t*<) CSO? it 1 BUI 
ttyt e> i'<«i urnme »hmm lfi4 itas-ii k;*;'!! 
Dl*!: 4') ;rdt^ liliijlc r.itnii (79? £2^0 1J?9. '.U 
liKk dxiMc »l(t«2 (])!] Ill!>}) CJ93. RA mu-.W 

«i'fli« >Wi«! %.a7? ir.i.wi cj'4. &) tf.in rtci/bii- 

•sKrd £*3/ aaaC" i'UO. 



PRINTERS 



ie^^-"^^ 




tt*3 ituii\ ?>?o 5hiny» c cp*ao era? ii??ai 

F7^9 Cwwr tFWfldO' t.1S; ItJM) COT* Cmoii 
RX90 t?77 i:2S1| S28? 6»on nXflTf.T SJK 
<(3$S: E31B E)Hin t-XiO C399 (£3'jb'i Ilj^R 
CimW'ifS naUiK B^'rle's .inrf Plft-,7 C tvpc' 
AfileiK; ntnikcf CJi (173 iJlCGlltHit, SrUhm 
tW4 Ubl> *2aO £240. N(CP4{' Oil: C<*ouf 
t"il«''t<olli'-EtJ*i:t12J:£lW merliteti tiirun 
irKabow* p«iiit«i<i fiuiii Vi: .:m ir« Cum'nodoi^ 
64 £45 (t41 > C<K V\e can supply I n elacts lu nin 

1(5?! (AS 

UK101. SUPERBQARD AMD 
VIOEOGENIE 

Wc Mill 3u0<»n tf^M Coin(u(«ri Write lor our 

COMPUTER REPAIRS 

WnnKf.! «<il<l'»Wc itpair >eMc» Willr fufft 



SWANLEY ELECTRONICS 

The Computer Export Specialists. 

Dept YC, 32 Goldsel Rd.. Swanley. Kriii RRR REZ. 

England. 

Tel: SV/ANLEY (0322) 64851. 

Otliix^ otch'S wflctfne. UK OfCti an? .^'rjivft lust snd mcl Kin .n<i.tf xnti VA r r/w 

mcnmi piicc 'r\ ottckes n for fxpct cu-itinntts in Ev'Opt .t/K* mctJftet insatrd 

.tfni.ti (KiiMjjt. Tne ilrd piicv n ioi exf.ori cu^tcnurn ouskle Cofooe \incliilirif, 

Aus^mHA i?(c' n/tc reiciiiiltfs tniwmS ai'f<^it piSts^c 



60 YOUR COMPUTER. FEBRUARy 1985 



E^Tf?: 



sn^QQ*^ 



._,<uHiuMiiLrdii 



io 



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.■^\-r^'''-^".^Jc£''-''' 



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graphics jnd c " *''«ofourT^^"^P 
"''^ n,ore^no°°^'^^<^ faster j; ^■"'"" '- 



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i. KCilu >i ulr^l^ w:U' it •.•t^■>^l^^ 

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>t I (. ! •! • « KA> H>*S* ,<!.;- 

.-; K.-!M)»i ■>. Wy '.kV 1' ■ -•. 

■1^'' -Pim -<fc i«>*a..«-. ^)t■" ^>/r(r t • i ' ' 

•»r *^'jr'lLfii.2v '■vr£5S.2« Fi>sr<r.,|.jtntvr., : •.^■ 

7^ HAW},! /-).:.>:■, O. I. 192. l?^.£m>, lyv i^r : -- it; irt ... i i ■ •. . . 

5J l*)'Ro4. i>4 ■'■•)' «i.<4. 64 •(^X^t«;r 1 .1 J,2.2 ?.2.4,e4.*« e4 »4^^ t4- Js/b4 

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61 




SOMKIHING I'VE ilwivs waiilcd i> my very 
own Spiay Test Simula or or STS Having, 
wiitiif; for over ivv*v years for ore to be rcic:is> 
ec nn ilic Spectrum, 1 decided U) write one 
myself.. 

This particular STS is eqiipptd with thrci 
dirterent sprays (J:'sifneH Ui elimiajic ihrct 
dilTcicnl types of crcaiure, plus ancther spray 
which disintegraici TNT. Your aim is to gi%'t 
these spray? the tair .ts! they deserve. Youi 
score will iiidicutc whcthsr you have t.ie skill 
to ba;i)nii: 3 professional S't'.S o]>iT;<ii\r — a 
scjrc of a niiUion is just abcut i^ood enough! 
Spraymania runs on any ZX-Specirum, and 
features sniooih, colourful animated grap'iics 
and a lot of sound. 

Fo enter Spraymania, fir-it type in thi B»sic 
header proRratii in lisiini; 1, and save it us.ng: 

SAVE "SPRAYMANIA" LINE 
In case you were wondering tlu 



RANDOMIZE 51 707 
statum^nt is efiscntiol. Also, the Kordtr I state- 
ment ii inportant. 

Then type in the machinc-codt lojdcr pro- 
grani in listing 3 and Run it. F.nte'r each byte 
as shown .n l.siing 2, inking cire to check the 
chcckfiLim after enicriie each -int. I:' vou 
make a misial;c in a line, er.icr 999, and i beep 
wil. sound, and you can enter that line 3i;a.n. 
If you enter <. byte which is obviously wro.ig 
ess thin 11 or greater thin 255 — ano'her tone 
A'ilt sound, ai'.d you can then enter (lie correct 
>ylc. When you have entered all the machire- 
code, fnd the checksum U correct, save tlie 
code after the leader progr,im, usinj! 
SAVE 'C' CODE 25000. 3403 

Rewind the catscttc and lua.i the eanK. 

C)ii nmning, tbe prograai goes into demo 
.mode, during which brief instructions — in- 
cluding the control keys — scroll smootWy 



a;ross the screen, On prcssiog a ki:/, the game 
Maiii wiili yojr spray-can appearing at the 
centre of the screen. At the -bottom of tliL- 
screen are the various sptavF, ard :» h(*niis box 
in which the bonus appears every so often. To 
collet a spray, or the 3onus, simplj.' mov: 
y lui can over ihe relevant box. 

■ Whirlers (bounce around the screen iTke 
balls) ^ 5C 

■ Gruesomes (vertical y-moving faces) = 
10 

■ Globules (move horizontal I/) - 25 

■ TST = 10C 

■ Bonus = 250 

Unlike t.ie mnvin;; rresituris the TNT 
doesn't kill on toach bit gradiialy changes 
colour until it heconxs white ant explodes. 

For a copy of Spra>anania on cas^ctt;, senc 
a cheque or postal order for i.l .90, to; Mr .'.R 
Wood, 22 Dervei Hill. Downham Market 
Norfolk, PE38 9nt:. 



62 YOUR COMPUTER. FEBRJARY 1985 




Nj 



Listing ;. 




10 


jPft'CR I: INK 1: 


BORtER 1: C 


LErtR 


2499'i': PRINT AT 


11,5; FLASH 


1; PAPER 7:"SPRAVMfiNifl IS HidUl \ 


NC": 


LQf\D ""CODE : RANDOMIZE E17 


07: PRINT USR 281 B7 






Listing 3. 




f 


-■S"^ f&iC'. ". 


.?sa4- 


■ iO 


wE~ "" •. ' -.» ~i» 


- -;;-:s *■.« i 


-Acf- 


7 5T;r hs ■i.' 'fi" 


1 iCCDE r. 5 ■ £■ 


■ -i3- 


LT r.N: P5 x: ■ ' 




£Q 


Ti^p^^iT I x- : t 




r>.i^ 


THPUT •• f ; ' : f -• 




40 


FGR n=£ TO '■ iT. 


- t* ^ 


SCi 


LET ',o\-^ 




5C 


ooz-n r, , ■■ " . 




-c 


I'.'iPjT hS PSlH" 


-S 


50 


~0=- i = l -;■ i.£! 


■^S ;;r.- i 


SC 


_r- :=*'■ - r£ 


--~ ", Z '. =". ' ' 


4Z 






100 


Pi>,E r,+t ; 




ile 


uTT h*=r. a ■ ' ■ 




lao 


NEXT t 




i3Q 


PRiN- ■■ = : 


iPJT •. o = I'-< 


liO 


I- '.it .. • TrtE--. 


= ffl( - i - . -. 


* r ,• 


'• - •-■■y i?a:P 


•3C ~r re 


:sc 


.-.cv— - 






= E"- ^r M ■ 3T0P 


tc =-,-■? 



Listing 2. 

25000: a07CCf>C6C6C67C00 = 10^0 

25O08: 80 1839731 HI HFP90 = 502 

2501&: ae7CB<>067CC0FEB0 = 83^ 

25024: a07Cai3C06B67C80 = 582 

25Q32: 0iaC(aD3O9Pei B t 900 - 92i 

25040: 0BFECaFC06867C80 = 962 

25248: 007CCaFCC6C67CB0 = 1088 

2Zi7Uiii Q eiF E Ob 0C 18303000 - Z92 

25«64j O07CC67CC6C67CO0 = 966 

25672: 007CC6CA7E067CO0 = 776 

ji^VOta-. /L"l-tU6U6l-tl-tL,6U6 •= 16/0 

25288; FCFEC6FCFEC6FEFC » 1914 

25096: 7CFEC6C0CeC6FE7C = 1536 

25104: F8FCCEC6C6CEFCF8 = 1808 

25112: FEFECaFCFCC0FEFE - 1904 

25120: FEFEC0FCFCn0C0C« =- 1780 

25128: 7CFEC0DEDEC6-E7C = 1590 

25136: C6C6C6FEFEC6C6C6 = 1696 

75144: FEFEiaiaieiBFEFE - 11:2 

25152: FEFElB18ieDaFB7a =>= 1156 

25160: C6CCDeF0FeD&3CC6 -=17:6 

251681 C0C0aaC0CC!C0~EFE - 16b0 

25176: C6EEFED(iC6C626C6 => 1696 

25J84: C6E6F6FEFEDE3EC6 = 1808 

25172: ^CrCC6Ci.C6C6rE7C - 1540 

25200: FCFEC6FEFCC0waC» = 1786 

25208: 7CFEC6D6DECEFE7C = 1596 

232 16: FCFeC6FEFCD8CCC6 = 1828 

25224: 7CFEC0FC7E06FE7C * 1332 

25232: F£FE181B18iai818 >= 652 

25240; C6C6C6C6C6C6FE7C - 1566 

25248: C6C6C6C&C66C3B10 - 1170 

25256: C6C6C6D6D6D6FE6C = 1S9B 

25264: 82C66C 383861X682 = 984 

25272: 6666667E3C181BLe » 564 

25280: FEFE(BE1C3870FEFE = 1236 

2528E: 3030301800000000 -^ 180 

25296: 0C0CeC 1830000000 -^ 108 

7S.'X04; ■<;R:^ft:'R07»«o:voB:W) = 33(. 

25312: 7E01EDBlBlBDei7E - 1242 

25320: O0Q0e002)0C0ClB30 " 96 

25336: FF8S68D5B663C1FF - 1440 

25344: 0000 ie3C3C 180000 - 168 

203G2s a7EaiFF33DBC713e - 1014 

25360: 63C6E5A7C993FFFF - 1551 

25368: FFFFC993E5A763C6 - 1551 

23376: 7 18E3DBClFFe07£e ■ 1014 

25384: 07E01FF93C7C70fae - 916 

25392: 63C6F4E7FED3CF93 - 1591 

25408: C9F3CB7FE72F63C6 = 1349 

25408: 760E3E3ClFFea7E0 - 764 

254161 07E01FFB3C3C781E = 780 

2542*: 7FFEEE77CFF3CB03 - 1602 

25432: CBD3CFF3EE777FFE - 1602 

25449: 781E3C3C lFFe07E0 = 780 

2544BJ 07E0IFFB3E3C760E - 764 

25456: 63C6E72FCB7FC9F3 -s 1349 

7S464; rF9:^FFr>XF4F7A3rA «■ 1591 

25472: 706E3C7C 1FF807E0 = 916 

25480: 07e0OCF01FF8318C -^ 951 

2S4Q0: B9CDB9CDF18FFFFF = 1674 

25496: B7£DAE753A5C324C = 987 

25504: 381C1C380FFBO3CO = 618 

25512: e7ZO0C7Birr031OC - 025 

25520: 35ACB5ADF18FFFFF = 1473 

25528: BE7D37EC2E7'1381C = 852 

2553tj: 3C3C.FF80~FaO3C0 = 649 

25544: B7E0OF301=Fe318C = 762 

25552: 339C339CFiaFFFFF = 1308 

25560: 3E7C3E7C37EC2C34 = 739 

25568; 3F-C 1FF80=F003C0 = 1044 

25576: 3FFC3FFC334C0340 = 824 

25584; 0340O340F-FFCia3 = 968 

25592: FFFFC5P3ECB7EE37 = 1S81 

2560B: EDB7FFFFD3iBFFFF « 1683 

25608: 000080003FFC3FFC = 630 

2561d: 334C0310FFFFC663 = 1001 

256:?4t FFFFr.'=;A:^Frn7Fr:^7 = i=ni 

25632: EDB7FFFFC663FFFF = 1737 

25<!^4e: 0000000000000000 ' 

25&48: 3FFC3FFCFFFFD61B = 1283 

25656: FFFFC5A3ECB7ED37 « 1581 

25664: EDB7FFFFC183FFFF = 1764 



25672; 07FE0FF£a33007Ba = 7b4 
25680: 069a06a80£C01F6O =• 625 
256681 IPAOlFACSlFAOlFOe - 7S4 
25696; lPA01FAeiFA01FE0 - 828 
25704: 3000360006000180 <= 239 
2S712: Ba602/19eFFFC924A - 1B19 
25720: FFFEFFD730AB9CD7 = 1649 
25728: 9CAA8CD6^FFEFFFE = 1686 
23736: IFFBIFESIFESIFCB - 10<;0 
25744: 1FDB0FB007E003CB - 864 
25752: 0180018001800180 - 516 
25/6H: Uld«Mltl00^C01FF8 = 732 
2S7S8: 6000700030003000 ° 304 
25776; 31FC33FE7Bfl6FFFF = 1245 
25734: FFFFC923DB6BC928 ■= 1316 
25792! DDABC923FFFFFFFF = 1648 
25800: 300CC813C4230420 = 546 
25808: 7FFEC3C399999999 ■= 1383 
25816: C3C3FFFFFC3FBE71 = 1470 
25824: DFFBCfl037FFE3FFC = 1365 
25832: e(a0B0Q0000fl0000a - e 
25840: ea0a3FFC799EF99t^ " 1002 
25848: EFF77O0E3FFC000a = 927 
25856: 0000000000000000 >= 
25664: 00000O0e0FF01FFB ° 534 
7'S«77! 399r.3«?9C399C3FFC - 954 
25880: 3FFC37EC37EC37EC - 1183 
25888: 18ia0FFe0000a000 •= 303 
25896: O3Cao"TEeOFr0B<?9a •• 834 
25904: 099a099Ca9900FF0 « 714 
25912: 0DBB0DBfl0DB00DBe - 756 
259201 0OB0ODBOe6J>QO3Cia - £75 
25928: 7FE07FFB0C30ODE0 - 1139 
25936: 09601 16003 7 0O6F8 =- 587 
2S144: 85F805FB0S~8OSF9 " 1012 
25952: OSF80SF805Fa07F8 = 1014 
25960: 7C0F0F0FE603F6S8 = 736 
23968: ft7C93E2BCSE3DCJZ<b - 1096 
25976: O06F292O291 1 A061 = 508 
25984: . 9780F0F0FE6E0E 1 - 821 
;i:>VVZ: t)(- /bt 61 bh 640^/06 = 072 
26000: O87E12142310FAD1 « 682 
26808: E1C1C92I00403E5B == 869 
26016: 360025Bi;j0hAt9:i£l = .'V3 
26024: 005805,207220 1 0FC " 552 
26B32: O620732C10FCC926 - 704 
26040: 40O6032E20CB162D = 426 
26048: 20FBCB162410F4C9 ' 1005 
26056: 21CC660101007EB7 « 650 
26064; C8CD74650C2318F6 - 939 
26072: CDE7652:015B35C0 ■ 859 
26080: 3608ED56025B1A13 - 52E 
26088: CB7F2B051 iEC66EE « 966 
26096: 804a04CD7465EDS3 = 946 
7A-04: 07l5Rr.91 I ISFCCDia - 808 
26:12; 66119CFFCD10S6)E = 883 
26:20: F6LD10667C3C18a7 = 785 
26:29: AF193C39FCeD5206 = 993 
26136: aiCD74650CC92AO4 = 682 
26144: 5B3A065B0E001911 = 302 
261S2J ie27CDS?3Cai3Co2 - 546 
26160: 06501801 1<;22B4SB = 276 
26166: i56F2600CD0166El =911 
2617ft: :;DFB6SC9EECD1E66 - 1324 
26184: E1C9790F0F0F4F79 = 792 
26192: aFaF4F3E 10087867 =- 482 
26200: lF371FA71FAe£:6FS » 96J 
26206: ^86779A9E6C7AB07 =1164 
26216; 076F1AAE772C131A = 526 
26224: AE7713040B3D20DD = 638 
26232: C9CD6a651 1E1FF78 » 1228 
26240: 06e2E6073A005B28 = 434 
26248: ai04772D771910FA = 579 
26256: C93Aa75BBE0CX;DOD = 60! 
26264: 66C92AO35B26001 6 - 504 
26272: FF0E13CDO766C92A = B45 
26280: 095B3AaB5B0E19CD = 504 
26288: 3866C9 1 1 1 756CDA7 = 857 
26296: 65CDC865 11000000 = 829 
26304: IE66CD9166CD9A66 = 1045 

7at:i7- rnA7/.6r9inani9ic: - 770 

2632B; 0F2A2A2A2A16132O = 256 
26328: 0F1D2A2A2A1E1317 - 242 
2A3361 0F2A3A2A1213tDeD = 790 
26344: 19iCeF00251DlAlC = 188 

(continued on pnge Bf.) 



YOJR GOMPLTER, FE8FUARY 1986 63 



FIRST 
AID 



/•,;?rv. 




for your 64 

Computers, like people, are fallible. They need the right 

combination of code and care to perform effectively in the 

business or the home. And thai requires first hand kntnvlcdge 

from you to create a healthy operating environment for your 

Commodore 64. 

Knowledge about machine language, about the lesser known 
qualities of the 64, about the disc drives, graphics, and about the 
tricks and tips to keep your 64 on line. That's why First Publishing 

has now launched in the UK a scries of high quality books and 
software packages to provide a complete health care kit fur your 
64. Commodore 64 users throughout Europe have already found it 

a tonic. We think vou will, too. 



' For a broilurc on all ikc Coniauid.ia- M U>otci ard Miitwitc sacUges aviilahjc Itoii: I 

IKirsi Piiblistiiiij;, jvlcasc till in ihc cou|Xiri jiwJ iCnit iiv Anvmib Ycrt. Firs: I'lijIiKninp. ■ 
Unii 201, Morsir^hcc {toad I Icrrscshoc Paik. Pingboumc. Bcrishic. | 



I Nairc I 

I I 

I Ur ling •Kotmdi. Ymk ;ii ((|7?S7! 52-11 <»t Cairo Softv-^rcat tl-5^ 71% yoS 




FIRST PWIISIINE ITI 



1 
















• 


























(continue 


d from page 62) 




27024: 


4368E60F07774F23 - 


664 


27704: 


4B6DESF1CBCBBE37 = 


1300 






26352: 


0B23170B18130B26 - 


172 


27032: 


3681C3CB6B3E0132 = 


801 


27/12: 


C921155B35C036a4 = 


649 






26360: 


272ft2e2A02eAB7O6 - 


IfB 


27040: 


0t5B32125B32205B = 


424 


27720! 


23CD5a6CCD2D6BC9 - 


983 






26368: 


292A141F16130B1B = 


210 


27048: 


21EC6622025BCDB8 = 


887 


27728: 


343E04BEC03600C9 = 


755 






26376 t 


2AlC0F2A2119i90E = 


224 


27056: 


69110907CDA765C9 = 


812 


27736: 


2346234E23CB7EC9 « 


783 






263B4: 


2C0Dl'?18lElCi916 = 


211 


270^4; 


Ar320C5D211 I5D36 - 


523 


277441 


21675306O2C5CD5a - 


725 






26392: 


2A150F231D27251B = 


245 


27072: 


3223233601237723 = 


364 


27752: 


6CC4436BCD5B6CC4 = 


10B3 






26400; 


262A1F1A29252426 - 


2B9 


2/080: 


360:22772377321D - 


442 


27760: 


876AC35B6CC4D76A = 


1159 






26408: 


2A0E 192 118292519 = 


241 


27088: 


332:213B772B7EE6 = 


766 


27768: 


CDnB6CC4B26BCl IB - 


1B91 






2o416i 


262A160F101E292S = 


241 


27096; 


03772E36a02 16853 = 


449 


27776: 


E43A0C5B32145B3A = 


608 






26424: 


1A262A1C1311121E = 


218 


27104: 


22185E3E3C320a53 = 


420 


27784; 


165B32215BC9AF32 = 


713 






26432: 


29251D23170C1916 = 


224 


27112: 


CD9B65CD£l6aCDlC = 


1223 


27792: 


I £36322836017838 » 


303 






2b440: 


2A1D121310JE262A = 


234 


27120: 


69CD1P6AC92 10000 = 


676 


27800: 


ED431A5BCDAB6CCD = 


1110 






26448; 


10131C0F29251E19 = 


211 


27128: 


22095B22aA5B2A73 = 


431 


27808: 


C4680101011E02CD = 


540 






26456: 


1A2A1C1921262A10 = 


250 


271361 


5C220E5B3E25F3ED = 


809 


27816: 


0E68C'?E»4BlAat(ll = 


/ta 






26464; 


IC0F0F240F290B18 = 


185 


27144: 


47ED5EFB:;921045B = 


982 


27824; 


486S3A20SBCB572a = 


684 




ri 


26472: 


232A191E120F1C2A = 


235 


27152: 


A=^77237723?7233b = 


691 


27832: 


03il43643AlESBC6 = 


569 






2f)480: 


150F232A1E192A1C = 


238 


27160; 


05C92l685BO6ia3b = 


516 


Z/B40S 


443i;WBbBL;D606BC9 = 


815 




•k 


2640B: 

2t406; 

26504 : 


0-1D1E0BIC1E2C1C = 
0ri70F17iBCaFlC27 = 
lil20F2AlBlF130D = 


215 
170 
195 


27168; 
271 76; 
27184: 


03231 0FB3921115B = 
:55C03A32?BCD4B6D = 
2108SB35EB237E2S = 


644 
973 
616 


27848: 
27856: 
ir/864: 
?7872: 


CDPB6CED5B1A5B21 - 
20SB01FEDFED7eiF = 
3aBB477BFEF07B28 = 
041ClCCBD61F380a ^ 


962 
989 
915 

572 






26512: 


152A0C1C1921182A = 


227 


27192: 


35C0772117SB7E34 = 


689 


?788B: 


IC1D23041D1DCB96 = 


512 






S6520 : 
26528: 


iai'?2Z2A14iri71ft - 
l[>2A1920aFlC2AlE - 


217 
243 


273001 
27208: 


Ce9t.2Aie5B2323CB - 
7ECCS76A23CB7D23 «= 


763 
926 


27888: 
27896: 


06FBED781F38077A = 
FE 102302 151 541 ED - 


830 
656 






26536: 


120F2fll6aB24232A = 


221 


27216: 


022E6e22185BC92B = 


545 


27904: 


781FlF3e077AFEfl0 = 


781 






2*i344: 


0Hlva 12ClAlCeFlD - 


198 


272241 


2BA7Cfi6C693DCA45 ^ 


937 


27'»12: 


28B21414ED531A5B » 


519 






26552: 


iD2A0BlB232A150- = 


219 


27232: 


693DCfiS869ES211~ = 


854 


27920: 


D5CDA36CCDC46aDl = 


1411 






26560: 


232A1EI92A1A160B » 


233 


272'»0: 


5B7EB720aACD4B63 = 


826 


27928: 


7AFEAaC07BFE£8CA = 


1539 






26568: 


23AC110Bi70F2Al? = 


340 


27248: 


eb033C77-DO66EEl = 


958 


27936; 


EB6D2604D6082a06 ^ 


654 






26576: 


2a0FlC00-DEE6704 = 


625 


27256: 


C38S693A1458eF0- - 


632 


27944; 


25C8D63820FA252E = 


S68 






26584 : 


CDEE67C925CD6e65 = 


1194 


27264; 


0F16005F19EBC9ES « 


B22 


27952: 


039421 1 E5B8EC877 = 


814 






26592: 


3A005E772C7711Ea =» 


672 


27272: 


218863CD7B6AC5CD = 


1104 


27960; 


6B2601 11 1400CD42 = 


454 






26600: 


FF19772D77C9780F »= 


699 


27280: 


4F66C1E1CD1F6C11 =« 


960 


27968: 


6DC9CDB6032 12058 = 


856 






26608: 


0F0FE6E0B16F78E6 - 


1122 


27288: 


BA00DA4466201DCB = 


662 


27976: 


CBP6C921205B7EEE - 


1090 






26616: 


lBF64e67C506eBlA = 


674 


27296: 


46280A043EA0E82a - 


562 


27984: 


t077E61OF609D3FE = 


1101 






26624 ; 


AE77132C1AAE772D = 


720 


27304; 


0CCB86iaa8053E10 = 


464 


27992: 


C9eiFEF7ED782FE6 ■= 


1337 






7AA?;7: 


74i.'<:i»Fr?r:ir97i«w = 


741 


27312: 


BB2002CBC62B2B70 = 


£17 


7Rn00! 


1 Fr00AFFFn7fl7FFA « 


1102 






26640: 


0055C5E5D5CD426D = 


1104 


27320: 


23233E0532005B3A = 


336 


28008: 


1FC92A1C5B7CA71F = 


715 






26648: 


D1EIE5D57D2F6FCD « 


1364 


27328: 


0C5BE5C52ia8£3CD - 


1002 


28016: 


571FA71FACE6F8AC = 


1106 






26&5&I 


126DD1E1C 1791209 - 


997 


27376: 


7E6ACD4F66CD7966 a 


1046 


28024; 


S77Da-OFACE6C7PC = 


1015 






26664: 


47BC20E6C921CC5B - 


£58 


27344: 


C1E11E01C3246BE5 » 


1016 


28032: 


07075= 1A2F12C92A » 


443 






26672: 


7E32145B3A205BCB = 


671 


27352; 


CS21E864CD7B6ACD « 


1201 


28040: 


tC5B73B7C8CD4B6D = 


1015 






26600: 


Sr2aBD34CD4CCOCO - 


071 


27360 f 


D467CIE1CDIF6C11 - 


1094 


28048: 


CD6A603A2BSB2DCB - 


849 






26688: 


DF180435C0nB9F32 " 


908 


27368: 


1900DA44662018CB =* 


672 


28056: 


6F2S022C2C7DFE20 = 


652 






26696; 


20SBC9E52AOD5B23 = 


734 


27376: 


4E2e0A0C3ElEb920 = 


449 


28064: 


2815FEFF281 1221C = 


689 






^dti/Viz 


uy6c:^au2:<;i>mo22ao «= 


438 


27304: 


O9C0eE 1803602002 - 


430 


2O0721 


SDCD6'>6DCDCD60dS - 


11S6 






26712: 


SB7E24B62486E1C9 - 


983 


27392: 


(:&L£2B71233E0632 = 


718 


28080: 


3A22S8C60477G9PF = 


880 






26720: 


79E607CA4A(.6680F = 


855 


27430: 


e05BE5CS2lE8643A = 


940 


28088: 


J21D5BC901FE7FED = 


990 






26728: 


47673E010F0F10FC - 


535 


27438: 


BC3BCD7e6ACDD467 = 


1060 


28096: 


7QCB4=^C;03A1D3BP7 = 


«?:59 






26736: 


453D6F220F5B7907 = 


509 


27416: 


CDDZ67C1E11E0278 = 


1098 


28104: 


C03A1E5B32225B2A « 


588 






26744: 


07074F3E10087BA7 = 


466 


27424: 


07070747CD2F6B79 ^ 


572 


28112: 


IA5B7O0F0F0FE61F - 


S4S 






26752: 


1F371FA71FA8E6FB = 


961 


27432: 


K707074FC3a26C3A = 


463 


:^8i:<;id: 


6l-.<;42^1L3bL:U6A6U = 


,'20 






26760: 


A86779A9E6C7fi80f7 = 


1164 


27440: 


lE5BBBCeCB76C0ED = 


12S0 


2812B: 


21205BCBAECB56CB = 


1022 






26768: 


076F04C51A47131A = 


461 


27448: 


SBlC5B7E913CFEe4 = 


796 


29:36; 


CBEEC93AlF5B87Ca = 


1205 






26776: 


13D558ED4BBF5B0F •= 


753 


27456: 


E07A9OFE10D07EF6 = 


1324 


^^8144: 


1 1I-A0BCD4466CD06 = 


853 






26784 : 


0FC30BCB0B10FB57 = 


794 


27464: 


5C77C9ESC53A215B = 


L020 


28152; 


6E010A0: lE00CDeE ^ 


371 






26792 t 


7BA1AE772C792FA3 - 


952 


27472: 


:;i0B63Cn7E6ACDC4 = 


994 


28160: 


6BAF321F5BC93E47 ■= 


785 






26800: 


S^7AA]B3AE772C79 " 


1015 


27480: 


67C1EICDIF6C1132 ^ 


932 


28168: 


52005B3AlF5B214a => 


426 






26838: 


2FA2AE77DiC10B3D - 


973 


27488: 


00OA44662031CB46 == 


742 


28176: 


64CD7E6A011D16CD = 


794 






26016: 
26824: 
26832: 
26B40: 
26848: 
26836: 


zaDDDCC9CA7'766CD - 
686578E6073A005B ^ 
0602 nE2FF280 104 = 
772D772D77l9ieFB - 
C92IC05A36I62C20 = 
FB0616CDEF68040E = 


1230 

711 

551 

736 

668 

845 


27496; 
27504: 
27512: 
27520. 
27528: 
27536: 


2aaO043E14B8200C = 
rBa6180e0S3EO2B8 = 
2002CBC6CB4E280A = 
0C3tllCB92aa9CBeE - 
1 8050 D 280 2CBCE2B » 
712B7023233E0432 = 


364 
622 
766 
675 
52B 
454 


26184: 
28192: 
28200: 
28208: 
28216: 
28224: 
28232: 


a467C9CDF569CD9D = 
693A2a5BlF7630eE = 
AFDBFE2FE61FC2D7 =- 
6ECDDa65ia25CDC8 = 
6CCD9A6t>3A085Bfi7 = 
CAC76ECDBC6DCDB7 =^ 
6DCD596D2B0DCD59 «= 


1433 

497 

1365 

1.098 

893 

1353 

859 






26HS4 ; 
26872: 


fc5WL:D/:j6SltB4l9UlflU = 
16030CCC7265i520 = 


A/a 
512 


27S44: 
275S2: 


e03BE3Ca2108633A - 
J65BCD7E6ACDD467 = 


7i:> 

1070 


28240: 
28248: 


6D20FBAFDBFE2FE6 - 
1F28FBCD416CCD25 " 


1317 
939 






26830: 


F91O20F20C0C0CCD = 


793 


27560: 


CDDC67CIE11E00C3 = 


1171 


28256: 


6ACD606C3A205B1F = 


727 






268BB: 


7265C9C5CDD467CD = 


1338 


•c'/:36B: 


ll-60bat:niilb0e>^LU = 


L US 


28264; 


38B71F3O8401OA01 = 


510 






26896: 


CC67C179C6074F21 = 


954 


27576: 


7B6ACDD*67CiElCB = 


1370 


28272: 


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489 






26904: 


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27584: 


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26912: 


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27592: 


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1151 


28288: 


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557 






26920: 


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721 


27600: 


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714 


28296; 


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564 






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728 


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2S304: 


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543 






26936: 


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831 


27616; 


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790 


28312: 


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861 






26944: 


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957 


27624: 


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90^ 


28320: 


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644 






26952: 


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790 


27632; 


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1466 


283281 


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647 






26960: 


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985 


27640: 


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440 


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547 






26968: 


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807 


27648: 


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865 


28344: 


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573 






26976; 


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452 


276S6: 


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042 


20352: 


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7S5 






269B4: 


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1122 


27664: 


30012=FE1BD03A20 = 


664 


28360: 


aS0BlE0OCG0E6B21 = 


399 






26992: 


C73C0777230E1E71 = 


385 


27672: 


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1001 


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447 






27aBO. 


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91 1 


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812 


2a37d: 


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S25 






270081 


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994 


27688: 


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973 


28384: 


B869CDB366061E76 « 


929 






27016: 


E60FC6B3774723CD = 


876 


27696; 


5F7EE6C3B377EBCD = 


1384 


28392; 


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1062 ■ 






YOJR CO?^PUTER. FEBRUARY 1985 65 



Who did you meet at the 
ZX Microfair? 




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REDUCED TRICE ADVANCE TICKETS: 






■^fijc seid tw Aduli like)! ^ U.25 

'lea(es«Md rrt- Child (sndei M vrs) tcketi @ i0.ao> njC^^ 

' cnd01M>r>>nTi*n> mldo pjyjtHk- (( ZX VIIC tODSlR ^ 

ind : i\fj rnciose i clamped, self iiddres'ed <?iv?lo)>i- br tep]y. 7Y I 

\>stloMiki'|oKns1on(Drs*nKf:jrH-}»iVC.ZXM[CROfi\IR. 

'H I'arkUne, rotlmhan, UndonKKOMU. KhIII-dIM 




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liiKtoscd please find a tlKvim- fo- ' "oifl 
11 1'kaie Ikk tov I'Mf IK ol olhcr ntiijtiiine'i ani bu?k.i 






THE 






MICRO WORKSHOP 

MICRO COMPUTER 
SPECIALISTS 

(Spcctrarr. Group Member) 

Software and hardware over rhe coianier For 
Sinclair Spectrum, ZX-81, BBC,. Vic-20, CBM-64, 
Memotcch, Amstrad, etc. 

* CUMPUTKRS * RAMI'ACKS 
^ JOYSTICKS * BOOKS 

* KEYBOARDS * DISCS 

* TAPES * LIGHT PENS 

* (X)MPONENTS * 

Business/Serous Programs available 

Located d'.rccrly opposite Epsom Main Line 

Staiion. Visit u.s or ring for friendly service. See 

and try bcfcre you buy. 

Ovcrseas/Cx.5oii oidcis welcorr.c 

12 STATION APPROACH 

EPSOM, SURREY. 

EPSOM 21533 



66 ^OtR COMPUTER FEBRUARY 1985 



,u'.««K Q 11 •■> 



..v'va 11 



u.xye 



«G0««1 Q I a -i « 





Ji^^ 



>,^s^ 



Get out of the rut with 
Vahid Azodi's machine code ride. 



Wars Kitf;f;v !<• a imally mnrhinft-coHf wiir- 
tcn ^n:nc r(»nhc Qiminodirc M anc includes 
the following featuics: 

■ Raste' interrupt driven smocth scrolling. 

■ Milti coloursd sprtes. 

■ Ve-v f asi and flexible conlrol of buaav — 
space sh p. 

■ Scare and high score festure. 

If you have not cccn 'hu game in the itrcades 
heie is a brief description. You control a 
buggy which cati jump md lire bullets in 
horizontal ar.d vert cal direct.ons. 

The gaine is played on a scnlling screen 
which scrolls from fight to left you have three 
lives at the beginning r-ftl.c game ai:d one Iilb 
is dedicttd every linie you fall into a dich or 
hit a rock or get hit by a bullet from the space 
ships — ener.iies. The object sf the gan'.c is to 



nay alive as long as pos.siblc. 

You conirol your ship with a joystick onlv. 
Sorry kjyljoarJ ficaks. The controls are: 



k^ 



UR 



F1 
F2 



U 



Pause the game. 

Resttitl game from the middle of 

another game. 

When the game is p£us«d yot restart 

the ga-ne by moving the joystick. 

Mckos iho buggy jump upwarde. 
UR Makes biggy jump up and f^rwarcs. 
R Keeps btgg/ sieady on the screen. 
L Makes bugg/ go qjickly to the lef:. 
If the bugjy is nade to jump it will not be 
, blc to jtimp ip aga.n Mraighl away so Jon't 
panic. 
So always brinj the joys:ick to tht ncutnl 



prsitirtn — r — after every jump If you don't, 
ih." bugg>''s wheels w;ll lock and vill not be 
able tD jump. 

Entering the ?amc is very simple, just type 
in th:: program like a Basic game. Tien 
rc.ncmbcr to s;ivc. t h^fofc y%m ruf ii. W^icti 
run the program displays the title jcrcin and 
asAS \ou to wait a .vhile lor the uame tn load. 
Be piticnt bet;iuse it's a long wait. The 
innructions on the screen tcllint; ysu 'o wait 
will chnngc to — iircis firu io start. Pvit the 
jt)>'sii:k into port 2 arid press the tire button 
and hey presto — he game starts. 

If you don't want to type in the program 
there is acasset:e availabi; for £?.00 inc. post- 
3f!c and packing Irtim; Mars liuggy, 22 Loiton 
House, West End Lane, London, NW6. 



iy priKE ^Jiafeny PuK£ Si:.ii::l.H ^Rlul^':m" 


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YDUR COMPUTEFI, FEBRUmHY I9i5 



{continued from previous page) 



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(continued on page 71} 



68 YOUR COMPUrCF, FEBRUARY 1985 






iLi^;-». 



^^m 




% r UE GOT ALL "HE 
I BEST BITS FROM E'^ERY 
h OTHER HCME COMPUTER, 
fiND MORE. I HflUE Fl 
64K HEMCRY, LIKE THZ 
|: COMMODORE 6-^ , R ::? 
1. CflbSETTE INTERFRCE;' 
% LV/E THE BBC. TWO 
UOYSTIGK PORTS, L IK 
; !HL JUMMUyUKL b/i. \ 
■ R BLILT IN POWER ' 
\^ aUHHLY, LJKt HL i 
I BBC; 16 USFIBLE 
[■■ COLOURS, LIKE IHL •^- 
h ftCORN ELECTRON , OUER 
i 70 FULL STROKE KEYS, 
I.LIKE THE BBC. ft | 
I CRRTRIDGE SLOT, LEKE 

f THE CO^MOCORE 64 . 
f: fl PRi^frER INTERFflCE, 
I LIKE (HE ORIC RTMOB. 
^ SOUND OUTPUT "HROUGH 
I THE T.V., LIKE THE 
I COMMDDUl^ 64 , HN i 
t fiUDIO/UIDEO OUTPUT 

^conne:ction, like 

?■ the COMMODORE 64 , ^ 
i-RF BUILT IN L'KE ^ 
^^THE SBC, fiND: ft ■ 
^^ SEPfl^HTE 16K VIDEO 
I MEMORY, UNLIKE MOST 
? NON-MSX COMPUTERS.::-; ■ 

1 32 sprites; more i 

iTHm MOST NCN-M5X ■ 
I COMPUTERS. RND I USE 
if MICROSOFT EXTENDED 
] BftSIC, LIKE EUERY 
^'^THER -1SX COMPUTER. 1- 



a 



"WOW. WITH ft 
SPECIFICRTION LIST 
LIKE "HflT, I 

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You'd expect one of the best-selling 
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specification list as big as its memory. 

But the Toshiba HXIO doesn't just 
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It was developed along with other 
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All of which m^es MSX the system 
of the future. 



So if you wantacomputer that won't 
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if you want ore of the best-selling MSX 
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TOSHIBA 



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to entea tYle souage uxyrdb 

op rmgjht^ Concofii 



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} 



U.S Guld Limited, Dait 10, 

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BlnniQgbamB? ILY.Teb 021-H9 3020, 



'%A^ 













(Continued from page 68) 



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IMAIL OKDER 
PROTMTION SCHEME 

If you order goods from Mail OrCer advertise- 
ments in this rtiagazine and pay by post in 
advance of delivery. Your Computer will consider 
you for compensation If the Adveniser should 
become insolvent or bankrupt, provided that: 

(1) You have not received Uie yuuds or had your 
money returned: and 

(2) You write to the Publisher of of Your 
Computer sumnnarlsing the situaton not 
earlier than 28 days from tine day vou sent 
your order and not later than two months 
from that day. 

Please do not wait until the last moment to inform 
us. When you write, we v^ill tell you how to make 
your claims and what evidence of payment is 
required. 

We yudraiitHe tu rTieet claims from readers made 
in accordance with the above procedure as soon 
as possible after the Advertiser has been declared 
bankrupt or insolvent. 

This giiarantftfl covers only advance payment sent 
in direct response to an advertisement in this 
magazine not, for example, payment made in 
response to catalogues etc., received as a result 
of answering such advertisements. Classified 
advertisemenis are excluded. 



72 YOLR COMPUTER FEBRUAFY 1)85 



VPI^^^^^^^^^ 




VII NVJ7 



An interesting and ver/ useful fjamre of 
(he new Amstrad coniput.-r, is :ts Ink coni- 
mand. This cnuDlcj ycu to riddliK tlu: col- 
ours available in any mode lo ihosc uhich suit 
you. Thfc User Guide cxpliint it by reference 
to pens and ink. For instance, in aiocc 1 lure- 
are 16 colours availabk, fiom a paktte of 27 
colours, 'lliis is like having 1 6 pens and 27 i.ik 
pots avaibbk- and the nk in any poi can be 
changed. It is soincihinj; tike VDU 19 i.uiii- 
mand on the BBC micro. As ^n ocampk type 
in: 

IFiesefi (P-ess 'Ctrl' and Shilt' £nd then 
Esc', holding all three down) INK ',9 
:Enter) 

You wiil see that a.l tic writing on the 
screen has changed colour — or shade if yon 
have a grten mcnitor. Vhs is because when 
you switch or. or Resei the computer, pen 1 is 
being used, and is set to colour 24, bright 
yellow. The above Ink tommand told the 
compuler lo change the ink in pen 1 to 
number n.ne, gr;en. Try other r.umbeis, for 
instance, 
NK 1,16 (ohangsQ Ihc inl< in pen 1 to 



orange) until you (^ct the hang of ir. 

This comminJ ccn be ustd :o ->rodu<x 
anin'.ation — movMiient — on the screen. It is 
done by redefniiiJ all the available colours to 
Ihc backfjronnd colour, anc making one co- 
our a a tiinc visible. Typ*^* in liMin^ 1 anc run 
it. You wil' sfiti ai tlic Kiart, the :;crL-cn tcinti 
fillec Up v;iih n'.ult cotonred veiticti linei. 
Then nK»si of them <tisappe3r, and a fiwsian 
to nTove acros' th; screen. 

In ac:ual fact, norhing s really movuij. 
What happens is ihst luics arc drawn Lsing 
the 16 cilTerent p.-ns T'icse pens are define i 
Hi Virions colrurs after a R -sn r»r switch or.. 
\ou can see what ih:se colours arc by refet- 
ence to pages F3.2 and F3 1 in tht .nanua',. 
The prograii then changes tli,; ink in all cf 
these pens to black — the background colour 
— sorhe liin-s app-ar invisible. Then each pen 
in turn s filled w.th Dright wh.te, and the ef- 
fect of movem:ni is achieved. 

Program 2 is the part of the pmgnm that 
actually changis the colours, Stucy carefully 
how it \totks ii.id dicu i^pc it ii: and stve it. It 



can then ae merged — sec C.h.8 page 27 ~ in- 
to any programs y<«i wrire whirt* use this 
technkiuc. 

Program 3 shows the sptciacuUr cftects that 
can b^ (xoduccd by this us^ag:: of the Ink 
c<imTTianc. IS crclcs arc .irawn — using .^in 
and Cos, .sc« pif.e F' n — usini; di:Tersni 
pels, anc ea;h one illuminated in turn. 

This ircthod car. also be a let faster than 
other ways ofanimatm^, tecause all that is re- 
quired is a few iines of Basic, ard several ob- 
jeits nt iiii'c c-:in move^ wher; oiher methods 
wculd have :o deal with each in turn — Lud 
wculd tltere.ort he slower. Progrtm -1 is a 
good example of this. Fens ^ to 15 are used lor 
the movaneiit, pen being the background 
cokiur, ard pen I xYr p?n used for the writing, 
and the b.ixei. If pen 1 wa^i used in the anima- 
tion sequenc;:, the boxes would flash en <.nd 
ofT, Note tha: this ellca ecu Id be quite useiul, 
bu: was unecessary in this program. 

Another point in ru\t>- is that in programs 1, 

3 £nd 4, if you break, using (Esc) (list), £nd 

Run then a^ain, the initialisation secucnce 

(ccnunuea on next page) 



YCUBCOVlPUTE=«, FEBRUflHY lybJ /a 



(ccHXtinueci (tom previous page) 
where iht multicoloured lines are diaw:i, will 
be invisible sincj all the p;ns have beer, filled 
wiih black ink, and are being written onto 
black paper So do :iot assume something iias 

gone wro.ig with iIk |>u)giaii. irituiliiiiij iJip- 
pcns lijr d fcvi' mimiici. Thii^ is most notice- 
able in progjam 3 A'ilh the circles, in which 
the circle; take i while to drtw. 

hi piograir.s 3 and 4 i have inc.udcd i delay 
Ujup vvIiIlIi jiiii be ulicicd by chuagiug the 
vaiiable 'delay' defined at the beginndiigof ;he 
programs. If you remove :he loop altogether. 



yMu, >vUI ^c. Miiiic idea of the speed ihsu cm cc 
achieved hy t.iis mcthcxl. And don't forget 
that no mater hoiv man* n oving obji-cis yoii 
had on the scree.i, (he speed weuld be the 
samef 

Auuklici ihiug ihas was pui in:o the pro- 
grams v/as:- 

CALL&BD-9 

This h a call to the machine operating 
system which makes the computer pause aniil 
ihe next frane, — i.e. uniil a full sweep of the 
screen is finished by the mechanisn inside the 
monitor. Eich frame takes about 1/50 of a sc- 



cotid, so ihiJ dois noi slovr down the ptogiam 
nctictablV: but prevents sontc strange effects 
rr^tinc pii,'.-> As r,n example si what cijii hap- 
pen withDut thii insiruciiDD;, rcnove line 205 
from Program I, bj' typing. 
if'J5(tnier) 
and run ihc program. You will sec that some- 
nnes rhere Ate rwr* vfttirnl lini's clcse to e.ich 
other crossing the screen, sooetimci just cne. 
Yol. can now try writing your own pro- 
grams ~ if you feel conlider.i enough! — us- 
ing this technique, because it has enormous 
pdtenrial H 



Program 1. 


120 


NEXT 


10 


REM «*» PROGRAM ONE *»« 


125 


REM MaKe all the pens black except pen 1 


15 


REM Initialise 


130 


FOR 1=2 TO 15 


20 


NODE 


140 


IN< 1 ,0 


30 


INK 0,0 


150 


NEXT 


40 


PAPER 


155 


REM Bet things moving 


SB 


c:ol = l 


i<W8 


x-i 


55 


REM DraH nsulti coloured lines 


170 


INK x,26 


60 


FOR x-10 TO 639 STEP 10 


180 


IF x=l THEN INK 15,0 ELSE INK x-1 ,0 


7a 


rtOVE )t,3 


1V0 


x-x + 1 


eo 


DRAW X, 395, col 


200 


IF x = 16 THEN x'^l 


90 


CQl«(col-H> MOD 16 


205 


CALL &BD19 


110 IF col=0 THEN col=l 


210 


GOTO 170 



Program 2. 




:5e85 x"! 
3806 INK K,26 


3BBB REM ROUI INE 10 SWAP COLOURS 




3e«7 IF x-i T-mt* ihK i.»i,n FI.8F iM<: 5<~i,a 


3eiAl REn U*o -or nsrging into vou- 


Onn prc^r^aw 


3808 x-x+1 


3«I2 FOR 1-2 TO 15 




3C09 IF x-16 THOI x-l 


3093 INK 1 .0 




3eie CALL tcBD19 


Za»* NCXT 




jwii uuTo fees 











110 


i^XT 


Program 3. 








120 

130 


FOR i-2 TO la 
INK 1,0 


18 REM ••« PR06RAM TMRtt 


««« 






1410 


NbXl 


20 MODE 








145 


REM FIRE AWAY! 


3a deldy-20 








ISO 


n-l 


'M i»4K e,e 








IbU 


INK x,26 


SB OES 








170 


IF x"l THEN INK 15,0 ELSE INK x-1 ,0 


60 FOR i^l TO IS 








180 


x-y + l 


70 FOR j-l TO 3<MB STEP 1 








IfM 


IJ- x"l6 ThEN X3i 


B0 ORIGIN 320, 20e 








200 


CALL i<B&19 


90 PLOT (ieO"12*i)#COS<j 


, (iSB- 


•i2«l) 


«SIN<j) ,i 


210 


FOR i = l TO del ay: NEXT 


leW NEXT 








JfJ^U 


tiOIQ Ihli 



Pfoyidiii 4. 




200 


CALL &BD19 






260 


FOR q=l TO del ay: NEXT 


10 REM ♦♦* PROGRAM 4 ♦»* 




270 


GOTO 210 


20 MODE 




280 


END 


30 RESTORE 




290 


REM SUBROUTINE TO D^^AW BOXES 


40 Ut:;idlY-100 




3(f>td 


MOVE :< , / 


50 PEN 1 




510 


DRAWR 0,-50,1 


60 LOCATE e, 2: PRINT "BOXFR" 




320 


DRAUR 65,0,1 


70 FOR i=l TO 4 




330 


DRAUR 0,50, L 


80 READ K ,y 




340 


DEG 


*?0 eOSUH 2VW 




350 


MOVE X , y 


100 NEXT 




360 


FOR z=l TO 360 STEP 20 


110 DATA 100,300,100,50,500,50 


,500,300 


370 


ORIOIN .x,v 


12B RESTORE 




360 


DRAW 5*C0S(2) ,5#SlN<z) ,i 


130 FOR a=l TO A 




390 


NEXT 


140 READ x,y 




400 


ORIGIN 0,0 


150 GOSUB 430 




410 


RETURN 


160 NEXT 


• 


420 


REM BUBKUUriNE ID DRAW LIDS 


170 FDR i=3 TO 15 




430 


DEG 


160 INK 1,0 




440 


col =2 


190 NEXT 




450 


FOR z=l TO 90 STEP 6.9 


200 x=2 




4o0 


ORIGIN x,y 


210 INK x,26 




470 


DRAW 60*CaS<z> ,60*SIN(z) ,col 


220 IF x=2 THEN INK 15,0 ELSE 


INK x-1,0 


480 


col=col+l 


230 x=x-H 




4VB 


NLXr 


240 IF >< = 16 THEN x=2 




500 


RETURN 



74 VOUR COMPUTER, FEaRUARf 1985 




THE KEYBOARD FOR ZX SPECTRUM COMPUTERS 



* EASY FITTING 

* PLEASURE TO USE 

* LONG LASTING 

The Saga 1 Errperor, equiaped with 67 keys, is a 
carefully designed replacement keyboard incorporat- 
ing rrany special functions for :he popular Spectrtm 
Computer. F^- business or plecsure. the Emperor will 
make your computing time more prDductive and 



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AND ALL THIS FOR JUSI £54.95 (inc. VAT) 



SACA P.Ci 

Your \iBry own Psrscnal Camer potti- 
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mgnuas BAd cas<;(«ti«s Q( sokf end 
dltractive conEtruction che PC. is if-eal 'or 
stcnnc anJ transoortro vour cornpLjiftr 
accC'S^ones. The case uses a strcng 
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Ony £26.95 fnc. VAU 

OUSTCOVER 

Anouier ccp qtaiity piYiCfuCt. UiS expetUy 
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dustco/er nas been specificall,' desigred 
for the SA3A 1 Emperor, which wll kcop 
ewryUiing look ng neat and d use free. Oily 
£4,95 fine VATl 




S0UN08O3ST 

Hritr iMt JiuyLoarxJ ::itc.i 
V.-.1 3AGA SOUNDBCXIST 
Tru GAGA SCUND6C03T .i. a liny elec- 
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ch4 sound tokiire inti gtjri-.y j' ehs SpRC- 
trmn sound g>.iuui. AtiJS'^bi« frorr a 
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"•fvelcseC to rdicveynur Sptcvim froiti 
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J I ; yc.r adis-on-, Mk nq I'll.- lyiiij wi;h eEse. 
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rr. Ki:it y^iif iMiirJu 

Milc-FjmaloFLEXtCABLE - £12.45 
Fcnale-FeiT^ile FUEXICABLE - ES 50 
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TRAQE ENQUIRIES 

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Address. 



~] 



PteBse write m: SiVGA Systarrs Lmitfid, 

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Telephone Woking C04B62) 69527/22922 

orTelex859£98 

Al pri;BS nciude VAT 

P&P fi^e lor Sourd Boost anc Fle«icaDle. 

P&P£125fai-S;iGA 1 EmperarUK. 

, £4.00 for SAGA ' EirperurEurupe 

[ CI S.OOf c rGAGAI C mpe-o.-UA-E R<sa s a nok eCHeO UizS. 'i'.O. Pa yalj/tf w SAG A Sysce ots L itt. | 



me fDilov.ingSACA FFOOUCi S 



Totaiamount finclos€d E , 




mmn 



rrogrsmmable 
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the Spectrum 

£19.95 





$ I* lilt 4f>: UsiCKii|«#ftu>iti(i 



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£13.35 

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un hhu cavCW • •>■■ ■■"'■ 



Dftitw inqjincs Welcome 
Hhone Luilow WbBA) 4394 



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ALSD AVAILABLE FROM 
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mm ns 



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AMY C0B«INAT10M Of 
LEADS MADE lO OnOET 



TRADE 
ENQUIRIES 
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rffiis? .likl , «„...„ r 

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T«tv(Hn. 01(0 £»& 



HIRE SPECTRUM 
SOFTWARE 



OVER 280 dilferent tapes la hittr in- 
:lLCinq ARCADE. ADVENTURE. BUS- 
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F)r a iimtea pe'iod. we 
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r4ame 
Address 



YC2 



76 VOUH COMPUTER, rrBRUARV 1980 





TOP 
SHOWROOM 



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another -(R15tPdr>dSJ E329.00+VAT 

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All iLonis over t15U available on our naav crp.rWt. terns 
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SUPERDISKS 

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Prices pc box of ten ex VRT 



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Lise as 

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fitUrtis 



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fVi&cnTeciimbivLull 



YOURCOMPUIhH. |-EB1U/>RY 19£5 77 



NowAmstrad 
givesvou 

over SOO 

to play with. 




CPC464 

cotrplete 




monitor 
datacbrder 



Free software worth over £100 is 
the name of :he game. 

Along with your new CFC 4(54 
(colour monitor or green screen 
VDU) you'll receive a software 
starter pack of 12 (yes, twelve) 
cassettes dbsolutelyfree. 

There's something for ever/one. 
From Koland-on-(he-Ropes to Kasi- 
Amsword word processing. 

That's one good reason lor making 
Amsti'td's CPC 464 your new home 
ccmpu.er 




Here ai'e the others. 

The CPC 464 comes complete with 
its own colour monitor or giccii 
screen VDU and built-in cassette 
data recorder. (OiJtit)tial Jibc drives 
are now available with CP/M* and 
DR. LOGO* supplied as standard.) 

It has a typewriter-style keyboard 
and numeric keypad. 64K of RAM, 
32K of ROM and a very fast extended 
BASIC with real time fcctures. 

And it costs a ^Teat deal less than 
the price of a comparable system. 

The CPC 464 can handle the trick- 
iest computer games (if you can), 



revision for exams, cataloguing and 
budgeting. 

And i: comes complete and rcady- 
to-go. 

Am soft A ton of software. 

Yes. Now there arc over 100 tit.es 
from Amsoft and independent pub- 
lishers. A:k1 the list is still growing. 
Arcade games, educational pro- 
grams and business applications - 
they're all desig:ied to make the 
mos: of the CPC 464's impressive 
giaphics, stereo sound and process- 
ing abilities. 

And wi:h Auislrad's syKidlmding 
capability, even complex programs; 
Cc.n be loaded quickly. The op'ional 
disc system will load a game in 
around 6 seconds. 
When youfccl the need to upgrade 
your Atnstrad syslL;ir 
to disc drive, just send 
your favourite Anitofi 
cassettes to us and 
well send you back 
the same Amsoft pro- 
grams on A.nsoft disc for just£4.95 
per cassele. the price of a blank disc. 



Join in the fun. 



Our CPC 464 User Club is a must 
for all owners. 

As a member, ycu'll be the first to 
know about the additions to the 
range. Iiarilware and soft\vare. 

We'll provide you m\\\ y(jai own 
privilege card and send you free, a 
year's subsciipliun lu the Amstrad 
User magazine packed wi.h pro- 
giams, features and infoniiatioii. 

You can enter competitions for 
valuable prizes and keep up wiih all 
the latest Amstrad developments. 

And with the free softu'are pack, 
we tliink that's pretty good for 
:^t£.rtenw - 











User 
Club 



CPC 464 



^A^^.■B£B■s»^|pnuMeEH 



neo^Tereo wMe 



EXPRVCUW 

1.) iit.i^wt.<.i»it str *tMBe(yji'iiiK;>rin«,rfi)iTiK«srjf I'ii- 




(MGRiiaim AnauumR 



BOOTS comer Currys Dixons 



John Menzies 




WHSMITH WIGFALLS WOOLWOItTH 



AND OTHER 

COMPLTER 

S^rORKS 



•CP.M and CR I.OfiC arv Tnkc Muk i o( Diaital KesearA 

Yil ike 10 know more aboul the ex;iting CPC 464 ctmpletc computer system. 

Pleaseseiid mc literature right a\^-ay. 

N.^ME 

AUUKESS 



P3S*rC01»K 



ilb: Amstrad Coraumor Bit ctroiuc» H,C, BrcntwDod House, li>9 Kin/e Road, lirentwcod, 
EsscxCMI4 4Er 

I PRICnSCOERECr AT T MEOKOOINt; JO PKKSS.NOT ,>LLST03ESSTOCK ALI PRODnrrS. 



rce 



Cronies and Frogs in IVlii(ro-Gen's Progs.... 

WITCH'S 



CAULDRON 



SPECTRUM 48K £6.95 




44 The Brcadway. Bracknell. Berks. 03M 427317 



LiHK I^ HARV. at thj spaccpHTi, cspaially it" 
you're ihe plot of a balloo:! hopper, and 
especia.ly now che spaceport has had a ref.i. 
Whii with ilic [Jew inlike ol' cargo and new 
processing techniques, it's a wor.tlcr I dtiri'i 
t>itc the spaccdus: in^re than I do 

Way back in September 1983, there '.vas a 
short projrari pul)lishcd in Yov.r Cotrptttci 
called Bal.oon Hof^r, by Andrew Foord. 
Thb wcllprcscnicd lii:k g>itnc hac lets of 
;H)ii-iuijl Lnd all ii needed was someone to 
expmd and dcvehip the game. This til 
nachjne<tide version for the Oric-i, called 
Heio-Zero, is thi: result. 

An vway, the control keys arc Z md X — left 
and right — and ' and ( — tip and down. 
Drifting from left tc right are virions oljjects 
rani^ing from dustbins to icecreanii. At the 
hot on", of the screen are cargo bo>:cs silting on 
5w,imfw |;rtuind — yes. I kttONv, there's .10 
grounc in space, but rtmemhcr this is only a 
game. Located at each side of the screen arc two 
set^ i>f pods or cundicters. These "arc" icross 
at regular intcrviils and reir.ain on lor tht same 
amount of time a* they nrc off. 

At the centre of the top of the screen is a tjpc 
of hoir.cbasc. Th.s iswhereHcro-Xcro needs to 
go in crder i« colteci iltc points from the cargo. 
In each corner of the screen i^re spikes which 
dct;r niovcmsnt orcund the perimeter. In thu 
centre of ihc swtnipy ground is a button. The 
idei is that you can stop tlir aicing of the pods 
by picking up a s;:ed from the cargo area, taking 
ii up 10 the homebasc ther. pressing down ihe 
bmton. Oti kvcU 1 to 4 thi» sivca 1 7 seconds 
relativily free movement and on level 5, 10 
seconcs and evtl 6, eight icconds. 

Just to reminc ycu, :he idea 0* the gamt is 
that you control Hero-Jiero around the screen 
pickini; up etrj^c und tailing it 10 :he lopofihe 
screen. 




HERO 
ZERO 



Hard times 
at the 
apace purl. 
Float off with 
Jonattian 
Richards. 



I6K Ori>' owiKTK cai'.not use Cie >ro^raai 
unless icri>us m.xlificaiior» are cariicd out. 
Even so, a 16K version is tvailabfe oa tipc if 
you s[Kcily this. 

Tic hcvdunips slww.i consist of (he da.a 
code — * 8OO0 to * ^ISO — and thj g-.mtcodc 
— # 9HM) :o J* AC3C'. To start entering in the 



Taoltf t. Ztffu Paye VaiaUltf^. 

Note: All val jes are givren in 
heifadecimai 

C 67 — HZ Horiz Counter. 

# 68 - hZ Verl Counter. 

# 69 — No of aliens 00 screun iNOASt. 

# 6A — NOAS Replica, 

# 6B — Toggle LocatlDn. 

# 6C — Cargo Screen add. LSB. 

# 6D — Cargo Screen add. MSB. 

# 6E — Cargo Data add. LSB. 

# 6P — Cargo Data add. MSB. 



# 70 — Al ne one screen gdd. LSB. 

# 71 — Alien one screen sdd. MSB. 

# 72 — Al'cn two screen odd. LSB. 

# 73 — Al en two screen cdd. MSB. 

# 74 — A! en three screen add. LSB. 

# 75 — Al tsti Uiiee st;i«en dOJ. MSB. 

# 76 — Al en four screen add. LSB. 

# 7' — Al en four screen add. MSB. 

# 7E — Alien Data add. LSB. 

# 7F — Alien Data add. MSB. 

# 80 - HZ Screen add LSB. 

# 81 - HZ Screen add MSB. 



Table 2. Hen-Zero data breakdown. 












Bytes 


#8CB2-#8E08 


- Iceaeam ciars - 


47 


#800(V.*ft4.'-.R 


- Titl^scrftfin 


- 1080 


#8CE1-#8D10 


- Cuochars 


47 


#8440- #8878 


- Samescreen 


- 1080 


*8Dn#3D61 


- Level 1 Cargo - 


80 


#89O0-#8BFO 


- Character sel 


- 752 


#8062* 3DB2 


- Level 2 Ca-go 


80 


# son- ^i 8020 


- Dustbin ciaro 


47 


fSOBJi^SEOS 


— Lev«l 3Csi'go - 


80 


#8C21#8C60 


- Tardis Chars 


- 47 


# 8E04-* 3E54 


- LeveMCago - 


80 


#8C52-#8C81 


- Clock chars 


- 47 


#8E55-*3EA5 


- Level SCago - 


80 


#dC82*eCB1 


- Balloon ciiars 


- 47 


#8EA^-f 8eF6 


- Level OCa-90 - 


00 



hes you can use (h< he^load^r shown or »1t<T- 
natively, you can use vhai I tiscc. This wa> 10 
enter the disjsstinhler and save i* to tape, tien 
add the tollowing Iinc5: 

2000C' FOR f = start TO finish 
2001C> PRINT HEXS(I). INPUT Ai^OKE ,A 
20020 NEXT I 
I would then Run 20000, and then start or 
continue typing; in ihu hu.\, iitapping at tcgubi 
in;crvalsto dieck lor errors usinj; the hexduinp 
or disassembler 
Once t^ie Cilia hai be;n lyptd in you can save 

it to tape us.ng: 

CSAVe-OATA" A * 8G0O.E * 9050 

Again, once the cod.- has been typed in you 

can save it l.> lipe usiag: 

CSAVfCOUb A* yi-tJU.t)* AGjO 

If you think ii's iclativcA' bug i'ret nows iher 
you tan siari tLc gunu bv typing- 
CALL#aFF5 

As usual, :apcs arc avai abb fcr £?.00 which 
contain Hci(»-Zero, the disa^set5ibl;r and the 
hcxloader. A Icatlet is also supplied giving 
dctais of the One Rom routines and how tii 
use iheni. 

.Make cheques «r postal orders payabb to 
Jonathan Richards, and send them 10 ?roiolt, 
12 Mendip Close, Gnat Sutton, So.ith Wirral, 
(>i.«iliiri F .6(1 iSK 



1 it;M »••* h£:LO«lER -*• 

:; wn 

U ?FI1 USE • <' TD DECREt-ENT HDP 
is ^KH use '7' TO END 
ft IKM 
10 nL?:PnPEn<.i tM<7 

iO PRINT tpRlMT" MtX-LOflDER" 

7-0 PniNTinniKTtlNPiJI" CNTC^ C'OBT ODMCC 
B -»B!lFS<BOnSHIfFFF1HENjOT0lB 
AO PRJNT! INPUT" fIND THE £NB flODRESS "I 
, E"!lFE.SORE>MFFFFTrtE'JF'HlN1CiH».7) tCOTCAB 
<i«i ri Ri PBT»TtPBiNl"-ST«(.r - "IK£)C«<e) 
tiZ PB)NT"EKD - "S-ttXtiEXPRINTiPRIHT 

it! uLKtk:^i.'iSi&e!po<EC23. £iia.s 
sa f-oBx=sroe 

bB PKlMTheX***) I" "UlNFllTHI* 



/e 0To»8 

76 lFM)i»»-:"TiCNPRIN'iPRINT:PRlNT":0«fLE 
TE- :M»'£C2l. 4Ceeet P0>.Ef,:7. J'sEhD 
e» IFUE>l<»li«.»2T^HG0T0e2 

1 le F0Rj=8Tnis 

I U M=A«<t> 

I 13 lFfi*=LtT>*N0Tn-D"ft»16*J 

138 lOTJ 

lie WKex,iTo;ME)fr)£ 

130 0OKE&21, Ateea:P0KE&:3i2rsEKt} 

itun DiMAtiis: 

3 aia FORN-3T(n:fl*«.N>^[t»<t«iSTe«(M). i: IN 

EXT 

1023 F0BN-lB?Clb!ft»(ll>=CHR»<.M«S5)iMGX* 

lOZi RLTUKS 



Table 3. 

# 8FF5-Slatlup — LuaJb tliu clididtler 

set and the ttlescreen. Waits for 
space bar to be pressed and 
starts initialisation, then junus :o 
main rout ne loop. 
#9F00-Mainloop - Calls seivicfi 

routines end monitors tin'ing for 
3tiens and arcs. 

* 9FEI-MDvement - Cietects key press 

anc moves HZ around the scccn. 
(Tab'e J caitioue:/ on next page) 



vniiR r:oMPiJTFR. ffrhiiary isrs ai 



(TaUlt: 3 continued (i-cm pi-&yiov$ page) 

Uses # 238 'or reading keyboard. 

# AIEE-Pickup - Checks lo pickup 

somethirg and prints it belcw HZ. 

# A2£F-Mov9aUen - Prints four aliens 

in 2 by 3 formal at va-iOLs 
positions arDuncJ tie Jcreen. 
Collects data for ciiaiacters frcm 
HZ bu(«er — *■ BFEO - * BF=F. 

# A450-Window, - Checks lor HZ 

moving off ttie scrser in the lojr 
directions, Copes lor HZ with 
cargo. 

# A600-Prin^arc - Pnnts aras onto the 

screen. 



# A60D-Wifearc - Wipes «rc (rem the 

screen. 
#A640-Setup - hitialilsation routine 

that puts HZ variables and 

characters into m^nnory locations 
#A723-Arcklll - Checks when HZ 

ciosses the arc boundary. 
#A742-lnc£-0 ~ Increments the score bv 

GO. 
#A752-tnc100 - Incentenls tne score 

by ICO. 
#A752-Plus1 - Increments the soore 

variables by 1 in BCD. Usee by 

!nc5C ard InclOO. 

* A77EEPmtSC - Converts score fiorr 



BCD to ASCII code and prills this 

to the screen. 
#A7C4 Compare - Determines whether 

cjrrent score s higher than tl-e 

high score. 
i A804.PmtHI - Prints high score cntc 

the screen and uses the same 

techniques as PrntSC but lor a 

different part of the screen. 
* A8CADwnlcchr$ - Down loads the 

new character se:. 
t AtJbb uwnidtttie - uown loads the 

title screen. 
* AS02Dwnldgme - Down loads the 

gam9 screen. 



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YOUR COMPUTER, FEBRUARr 1933 83 








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If you've got a 48K Spectrum '"and accounts to 
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FINANCE MANAGER £8.95 PLUS 80 £19.95 

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Having all your finance records so neatly stored is 
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VAT MANAGER £8.95 PLUS 80 £19.95 

Your VAT 100 return need no longer be a 
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Manager will ctiec< ell calculations automatically, 
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PLUS 80 STOCK MANAGER £19.95 

Provides a controlled stock environment for up to 
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Tt^e program hasfacili'ies forttie oroduction of 
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Management fias never been so easy! Coupled v/itti a 
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Thk IDBA OH th s game is to crws rhe screen 
and collect ihc bags of swag and reuirn with 
them to the get away car. You will be 
hampered by faUingbo-itb^ and a de(t by sMmc 
defences. Each k-vci mure bombs wi I fjll and 
aficr -A spvcified numb*r of poit^is cither one 
or iwc blacky \vill be renewed. Also on etch 
1<?v;I the procrom will play a new iun<- it 
knows four 'linT'Tpnt ones 

The proprfm -s ic three parts, fho.igh rH^r^ 
arc four parts to type in. The fitsi part Uh<Is 
the o'hers and sus up 'K* UDG's and 
Hn^clopci. Th: second part mikei ihc 
ma-hinc rod? and stores the muUi-coloufed 
chfarters^. The fina. part is the B^sic 
prcgram 
Typing in ihc program is cone ns Toltows' 
Typi- in prnpr«m 1 and javc it as 
"Holdup". Now t\pe in program 5, Pun it. 
type Ne\\ i?rd I'ucr proio-ani "^ and Kun it 
N«>w >avc ihi- (Adc made by these prc^rams 



?> 1. 1, ■■ .i^a.« 

itCCniJ-'limTTI*!!, 17>'For /0.« OHRITe* , •»•» 

^KnAiN*vciD ur- 
giO«r«9.7.3.S.7.*.3.&.&.9.(>.2.3.'1.'l.3.>.11.3.a :s .s 

,*,».s,?,T,5,r,it.i,»,«,*.*.2,3.».ii,5.i2 ti.3,i*,i.a, 
M,7.3.:i.J,a »,4.i,ii.4,9.ii,v,i, iv'.T.a,:?.*,!,!!.* 

«HTM,I& 1,3.14,4^.14.11,3, 19. >l. 3. If .le^S, It, la 
,S, l.,7,4,M,!,5,7l,7,r,?l.:,3,l>,4,-.19,;l,3,32.1l,3. 
34, 9. a, 24, 3(4 21,4,3,i^,4.3.'.f2,Y,a,'Jt,*',3.2l,4 

7.l«.3,7», 1 1,5, 5», 11,3.17. 'S.^W,?,*,-!?. 4 5,34,1,5,%, 
2,3.17,1,3,3' 3,3,>9,7.3.J4,/,3,14.1I,3,3;.1I,S,33,4.« 
,M,4,3,9,4,1.».1,3,H,3,3,34.I,4,<.S>,T,3S.17,3.^«. 

14,1 7 14,3.4 *7 



with 

•SAVE Hold-Uo 2981 2FFF 
N:5w type in prcuram 4 and save ii is 

"Hold-Up"- 

When leading the pr:>grini make sur; the 
DFS is di^ablfd as the prcera'n 5ets Page "o 
&D0O. 

Storing high and low bytes for the machine 
code is made easier and quic>,t'r by dircttly 
iccessing (he re.tideni inteti>,'r \':!»-<sblei=. These 
variables are stored from MOO mv/ards and 
each one 'akcs up foui by'es. So ?.''/o i« at 
&400, "*% 13 at &404 and so cii 

VPhcn the game isn't beini; played the com- 
pilfer will show either the .ligh score table or 
the instructions. These will De flic!<cd btr- 
weei when th? scrolling message a( 'h'- top sf 
the screen is finiahcd. To toggle between 
then al any time press Fscape. 

T'j change tie difTiculty ci'tbe gimc pn-ssC 
on on<- of he above scrccn-i. 



Program 3. 



10MODE1:HI 
MEM=?<2980 

20PV.=&2^01 

301: 

40LDY»««1F 

501 DA?<2PE0,Y 

60STA<«.7C» ,Y 

70DEY 

80BPL P'/.-8<06 

90RTS 
1 00BRK' 
llVJLUYttiklh 
120LDAttS<a0 
130STA{?<70> ,Y 
140DEY 

150BPL P'/.-8<03 
160RTS 
170BRK 
ia0LDA#8<E0 
190STAS<7a 
2O0LDA#««7A 
210STA&71 
220LDA#8{00 
230STA?<6F 
2401 DY#S<00 
25BLDA(8t70) ,Y 
260CMP#S<01 
270BEQ P'^+i<lC 
2S0SEC 
290LDAS<70 
300SBC#?<20 
310STA?:70 
320LDA«<71 
330SBC«8(00 
340STAX.71 
350CMP#«t34 



360BNP P7.-&17 

3701 DAS. 70 

300CM»#4?F0 

370BNE P-'l-R'tD 

4O0JMPR-2F7A 

410JSR&2F0D 

420CLC 

430l.DA8c70 

440ADC#!<80 

450STA?c70 

460LDA8t71 

470ADC#?<02 

480STA&7 1 

4901 D/#S<00 

5O0LDA(«<70>,Y 

5!0CMP#S(14 

520BEQ P7.+?<1S 

530JCR8,2rai 

540SEC 

550LDA8t70 

560SBC#!<A3 

570STA&70 

580LDA«</ 1 

590SBC#?«02 

<b0OSTAS<71 

610JMPS<2F39 

620JSR&2F0D 

630INCS/6F 

6^0JMP8<2F61 

6S0EIRK 

6A0LDA#5<00 

670STA&70 

680LDA#S<7B 

690STA&71 

700LDv#?<00 

710LDA<?<70) ,Y 

720CMP#8fOl 

730BEQ P7.+8<ie 

740CLC 

7S0LDA?<70 



760ADr#8t2O 

770STA8'70 

7801 DA?r71 

790ftDC«e<OO 

8005TA8?7J 

8J0rMP#&7D 

820BNe P7.-8'i7 

830LDA8<70 

840r,MP#?,80 

B50BNE P7.-&1D 

O^BPTG 

870BRK 

880JSR?<2F0D 

B90INCS<6F 

920JMP8c2F8A 

910BRK 

920LD>#?!03 

930LDV#fr.3r 

940LDA(&74> ,Y 

950STA(&72> ,Y 

960EEY 

970BPL P7.-&05 

980rL r 

990LDA?-'72 

10e0ODC#«iBB , 

i010£TA?<72 

1020LDA&!73 

1030PDC#&02 

10^0STA?<73 

10ti0LLL 

1060LDfi8<74 

107OADC#&40 

10a0STA8(74 

1090LDA«<75 

1 1 00ADC#&0B 

lli0STA&75 

il20DE)( 

1130BNE P7,-&24 

t 1 40RT5 

11503 



l)6eP'/:«8(2B01 

ii7ec 
I laesEC 

1 !90LDA?t72 
1 200SBr#a.08 
171PIRTA?,72 
122PLDAS(73 
1 230SBC4«?<00 
1 2409TA?'73 
12501 DX #8*03 
1260LDYH&38 
127eLDA(?*72] ,v 

]2aBCMP«jt.ai 

129eBEQ P*y:+8/3A 

1300TVA 

131CSEC 

i32esBc«?<0n 

133eTAY 

1340BPL P7. ^(©B 

1350LDA8(047O 

1360BEQ P>;+?t2D 

1370CMP#«<08 

l:SB0BEQ P'/.+Sc2D 

1390CLC 

a 100LDA&72 

1410ADC#8t0B 

1 420STA8.72 

1430L DA&73 

1440ADC4t^00 

1 450STA&73 

1 460LDX4f8<03 

J 470LDYt<?<00 

1480LDA(&72),Y 

1490Ch'P«8(03 

J500BED Py.+«tl3 

15iaCLC 

15201. DA«</-.^ 

1530ADCtt&80 

1540STA8-72 

1550LDA&73 



i56eADC#S(02 

l570STA?c73 

1580DFX 

1590BNE Py.-?< 14 

1600RTS 

1&10INC&76 

1620RTS 

1&30CLC 

i640LDA8<72 

1 650ADCIt«<4e 

166kablA!t72 

1670LDAfc73 

1 o80ADC#&00 

1690STA?.73 

1700JfiPi2B35 

17i0BRK 

1720LDAIt8«E0 

iv,50a! A4<./0 

1740LDA»8<7A 

1750ST.'>£(71 

1760LDY»?<00 

1770LDA(8<70> ,Y 

1780CMP#?<01 

1790BEQ PX+8«1A 

1O00GCC 

iei0LDAfe70 

1820SBC»«<?0 

1830STAS<70 

1840LDA&71 

18S0SBC#g(00 

1860STA&71 

1870CMPtt8<34 

1880BNE P*/.-M7 

1890LDAJ(70 

1900CMPtt&F0 

1910BME PX-StlD 

1 920RTS 

1930J3RS(2F0D 

1940JMPJ<2B71 

19S03 



€6 YOUR COMPUTER. FEBRUARY 19B 



Mn G ^& 



Bag some swag 

with Barry Wakelin 

: on the BBC. 




Pfogram 4. 



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VOURCrMPtrrFR FFRRIJARY l9fB 87 



1EA1> 





I I M4:^ 



.iH»i€' 



II I 400^ 



trt 






i!!!!iil 




!;<l 



l'!il!!i;ii!Mt; 







irii 



* ' mi 1 1 1 1 n 1 1 1 1 I M i 1 1 u ? 



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e 







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^'■"1 I I « T MO-CT 



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■'(HTWtnTnnf 



■l« " ''i' " ' » ' " 'i' "" l 





'pb'ATH [:h.\s1- sr\UT!\I) :is :i slr;iij;hrrorward 
conversion aiu-nipt nn r Spccirun progrnni 

finhlishcd hy Vr'f Omipuur sonit linie ago. 
u the process sonii: of the iiterna! eoings on 
of i!\c A^i.ttrad were rcvcatcil Jiid i.ic kjm.1i h 
^ playable and colourful gamv. This ar:iclc 
gives I he finislcd proijram ;nd also dctai s of 
screen display corfiiiuration and how lo add 
c.Mra commands tc your Basic — lateral scroll- 
ing, cnlir^cd firinitng and screen cliataciv. 
reading. 

In convening Sncctrum Cross (,i Amarad 
Deati Race there were ihrcL- fiindanenra! pro- 
blems to be faced Firsi the dilTcreni size o'~ 
the tcxi screen, second the way llic bc.ccii 
start moves arcund in memory, and ihird the 
way colour is mappcc. 

T^K- Amsfrad hai iliree scr.'cn mcdcs. Mode 
;2 is the high dcfiniiion, two colour mode, 



36 YOUR OOMPLTEn, FPBRUA^V ig85 



Mixic I IS nied.iirr resolution vith 40 c-nl- 
umns of text in four colours. Mode is the 
mutii-colcur nrcdc wiili 20 colj'mn text. I 
decided ti- rcdnci; the number of cars and tor- 
I it-A on tht lund lo cnab.c mc i<> make th< most 
of the colours. 

.'Mth.iugh tile number of columns would be 
less ihan ihc Sptctntm s, the number ofiir.es 
available was more — 25 instead cf 22. Since a 
dutbic licigh piiiiiittg rouiinj has long been 
one of my favtjtirites, the answer .vas obvious. 

The screen dispby occupies th« atea of 
memory from hex & cOiX) up ind is composed 
of 25 linei etch with eight rows of 30 3ytes. 
Sonc arit'imeiic tells y>u :hai ihire is s little 
memory left over- at the end of the screen. 

This fact, coupled with hatdware scmlling 
of the screen wlien for example listing a pro- 
gran, mesns :hat the byte -.vith acdress &cO!)0 



may not in tac: be cxpccicd top left-hand cor- 
ner. It eX)uId be anywhere, even off the screei 
altogether. However, after a mode clviiigc ilie 
screen :s icse: so that solves nuny of the 
problcn.5. 

Now supposing the top left land corner is 
AcOOO ther. wc might expect the byre in iler- 
neath to be &;050, but as on the Specirun 
that is t.ie top byte of th-i second Ine — pi.xel 
iinv nitic. Thinkinp igain and given that 25 
lines times 80 oytcs = &7dO we migh expect 
that second byte cowti to be &c7dl). h f?rr it 
ij &c800. This t.dy figure is arrived at bv 
simply tagjjinj; roughly half a line on after the 
bottom 3f the screen. 

Cclour mapping is at its simplest i:i Mode 
2. Here the eight pixel width o:'a chaMcter is 
matched by th; eight bits in ore t:yic. Hence 
80 cnaracttrs per line n-^eans 80 bytes acro^s 



itn>iK«M' L*t:**>M ty^r4t?t. 



C J Ltli;*! 



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ir I»*rtV<e..-B -HTM y7-Yl-7 

ir iw.:vii'--a iiCM •v-.Ki 

ir «r-/T T»cH 'i7-**v 

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xrATt n I .^iirvt H <-ni ixiri.H jttnciNi * " 
ii!:i»(ii I .4,9,11 4,1-.. yn.'.'i 

■ p:ti:Kfii ,r,it, :>,1f,l/ 

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II hnrp/^ INEM IBSmn.l ,; ,11 



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41* pfiwi •B"i»E'' II" t 'rem 

3«a !i vi.yi ntN sojsi z,:o,?»,t3,:iM«-»-«rerei5n.<ii; 

A'C I 24iPA>Cn lliPCM tiPBINT ";Ca)lt"l«Oir*l!ntl4l ,74 

3?t FOR h-l to u«u»«i>*«T 

r.'.i* ootp 51(1 

inwi R1 n »»r4-ji>iv*M 

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in'.« I 4«^f*>ii lltfN ri-«r«i-v 

in4it innAiT i,rrii>iPnB npm imituki •■ iiam itinii 



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.'BaM III HT 'i-piri|.,f1 a-tit i;4l ir v^rily* 

'.'oai4i INI 



DEATH 



RACE 



C J Leigh with a 
very colourful 
version of 
Frogger for the 
Amstrad. 



:he screen. Each bit resei is pap;r colour — 
asuilly pen — and each h:\ set is usually 
;>cn 1. 

In Mode 1 thing; are more difflailt since 
:he vharaacr widili covers t\vx» disp ay byics 
uinrh f.sich ]>i\f! pen heini? represented by i!ie 
yXAXz of iwo sits, sti givJiiEi thc ;bur colours 
available. Th?se bits aic not consccmivt; Ihji 
the byie ii split .n two wiih tne :iiom signiii- 
cant bit of each half rcprcs»ni.ng the leftmost 
pixel ofihL- byte. 

In .Mode the same jseneral idea is foUoA'- 
eu. The characici A'idih covers tbwr ">ytts, 
eac?i byte rep'estniinj? iwn pixels The I'vie is 
split irto four w:th 'he most significant bit of 
eaci quar.er representmg the left hand pixel 
of the pail. Each of the qusriers contributes a 
bit to a 4 bit numh;r with ihe bits weighted 
l,4.2,t: indici-iin^ ihc pen iiuinbiri used. 



Ex:eniions to Ams'.rac Basic can be made 
v«ry easily by setting up a name table and 
JLinp ta.^le as in listing 1 alonj; v;ith a fou.* 

b/te buHci ;iii(l il.c lug, un uuiitiit: ai &it400. 
Each command rausi be piectded by a ba: 
character available on thi @ kev. 

The scro'lin^ routines ari siraighilbrward 
whilii tile double heigh: printing routire i> 
u>eU afiei t le Xuiii lijs pihiied tu ihe scteeii. 
The tnachine codi readi the bytes of colour 
o:T the screen and doubles them up. Screen 
character reading .s d^ne using a Rom system 
call. 

Using machine code iu tliib way isi vet/ ai- 
tiact ve and is made even easier since it h 
passible to pass parameters from Basic to your 
Otvn code and back *gaia. These parameters 
are {Minted to by the IX reg ste.' pair with the 
tiuiiLH;! uf )><it4■l».iel^ given iu the A iegi!>lci. 



In fact, the IX pair poirt tC' ih; lew byte of 
the last parameter passed and is the bfse ad- 
dress of a parameter bufTtr set up fjr you by 
cUc sviicni. Ifilicic is only one pnramct;;r ii is 
iivaihihle in the DR rjgisier pair tnd it :he 
pa.-ameier is an integer v^iriable preceded by 
<§: then it is the address of the vtriai^lc that is 
passec to the maL-hine code. That allows 
values CO be transferred bick to Uaj-ic. 

The graphics characters n the program 
lis ing niav be e.itered most eisily b/ cr.tering 
an:l rinring tlie shun routine at line 6000 
first. This copies the SpecTum system of 
iiiakiiig iltc keyliuitid (.lut-uce ili.: uppiupriaic 
graphic character when Coitral is pressed 
with one of :hc keys A to U . 

The rojiine at 6040 returns the keys to nor- 
mal if required. Follow 'he guidance of the 
(continued on page 91) 



YCURCO\APUTER. FEBRUARY 1985 89 




Premier Rrcades 




As licensed by leading 

American Arcade Game 

manufacturers to 




DISK 



9*95 ty^9S 



THE ULTIMATE IN AMERICAN SOFTWARE 
FOR YOG ON U.S. GOLD 

U.S. Cold Is ilockedby all tending compatcr stares includtng: 



John Meniies 



^WSMITH WILDINGS WOOiWORlH 



PacMan<Bandcha'acters a-e tfadeirarts of Sal y Midway Mfg., Co. ©1980 for the Western Hemisphtrfi: Tracemarks of ^a(nc6 L:d. ©toeo ttyouchcut thj rest of the world, 

Licensed to Daiasoit, Inc. b/ N»mco-Aneriea, tnc. OigOug^ijiJestBnedandenff.neered! by f^3mot)©-982. Licen&d to Oetsscft, Inc., by fJam:y3-yi;mefica, tnc. 
Mr. Do Is Q trocomtrk of Uniycrwl USA, lnc.*!'t904. Datasoft isa te-jbtweU uatlidia kof Dawsoh, (tc, frerrler Arcaie* i a iradennaik ot Oatasott, ino.'^iyaa Dstasoft, Inc. 

A( rights f?served. 



■5 
5 



{continued from page 39) 
Rera statcmer.ts when typing in Tne graphics. 
In addition ycu may iind il ea^iel• to cnitr llic 
machine codcif ytiu iirs enter Key 1 >8)"," :o 
change the dechyal point on the numeric pad 
10 a comma. 

FjiaUy, since the user gripli.o; do noi ullmv 
vou to mal\e the mosr of the Amsttad's colour, 



three difVerent ways of going this have been 
introduced in t.ic icreen conuruction louiinc. 
Thc)' nijy be omittec if preferred since they 
sbw down :he screen pr.niiig. 

To slcvw do^^n thc »ame incrsase the vilue 
of the pause used at the end of tlie main loop 
— sel ill line 160 — or to mnke it much eisier 
remove some of the traffic. Every lime yov ge: 



four men heme ycu will lir.d extia spiders 
added and tlu speed will increase. 

You can avoid the chore cf typing :n the 
program by sending £3 with your nan:e and 
addrecc to Denth Ra;e, 12 'llie Bai^seits, 
Cashes Green, Slnud, Gloucestershire Gt.5 
4SI. Please make cheques payable to 
C j Leigh. ■ 



List' no 1. 




ORIGIN A(t008 




W 




DEC C 




OlOSfcti 


IHITIAL U> BCfCOMIAB 




20BI> 




JUKI S7HE1C1I 


; d« it *KAin 


210i.0k 




LD DL.BUFFKR 




7C 




JD A, 11 




CDDIBC 




CALL DCDIU 


; ttU the aystcD 


I6OS 




SUB 8 




C9 




BBT 




'7 




LD I, A 




OOOJOOOOBUKJ'EH 


PKFS d 


I iiyat«B work apiet 


CI 




POP BC 




ICAt 


COKTJIR 


DKW NHKWB 


; ctmat.nA Lahlt' 


lOE? 




DJNC KOV 


I aext read ro% 


C31i7A« 




JP PKIKT 




M 




POP DE 


j dralinatitn = source 


C37BAJ. 




JP LSCUOLL 




CO 




»BC C 




C39CA4 




JP KSCHOLL 




SODC 




JUKI WLP 


t top b«lf 


C3BDA% 




JP CUK 




C9 




lET 




505i:'i9 


KMETAB 


DErn rw 


i cfoaiaa ii«s«« 


»5 


ueciio-^L TOSH Ar 


1 BBve pkraai:l.rr count 


<>BM 




DEIM h»U80a 




CD33A4 




CALL ArDRESS 




/.cs^it^isa 


DEW l.fi.C.R 




llOCCO 




IV JK.COOOM 


t it*rt of top 1<n» 


kYkCCC 




D8m (,L,U»OH 




19 




ADD nL.DE 


( tcDcn ndcresK 


5253 << 352 
^FiiCCC 


DSm t,S,C,B 
DEnJ (,L,U8aH 




C608 
C5 


BACK 


ID B,a 

WSE Ht 




k-^uanz 




BEm C,H,R+80H 




15 




n)Sf Bl 




oo 




PEfB 


i «ad Dnrltpr 


M 




KVP UK 




mbmo 


A31)R12>S 


LD L,(1X40) 


; etlcilate »ereta «t*rt 


33 




INC Bl< 


{ n. '.0 la 


OD23 




INC IX 




nii(i>nn 




ID EC.JiPB 


1 lta< liagtli !««• «oa 


DD2} 




INC IX 




lA 




LD A, (UK) 


J »0T« flrat byte 


so 




tU L 


1 atort at line etr» 


EDBO 




LDlfc 


; HOT* list 


2600 




U> B,0 




12 




ID (D£),A 


} vrayaround byte 


29 




ADC n.BL 


1 Multiply by tvj 


01 BOO 7 




ID K.TBOU 




29 




ADi: UL,BL 




09 




JtDD UL.BC 


i next pixel rotf 


»9 




ADt: HLiUL 




CI 




FOP DC 




i$ 




Al>l, UJL^IIJL 




lOBB 




njKT IIACK 




E5 




PUSH HL 




n 




rop AP 




ni 




VOV Ufc 




3n 




hur A 


1 ra-Hi rr pnrnnvtar' ee«Jtt 


89 




ADr BL.HL 




aoso 




JRNZ i.scitoa 


; nnxt line? 


89 




ADC Bl.HL 




C9 




iEJ 




i9 




AM HL,DE 


) timtt eighty 


P5 


B.SCR011 


msii A> 




<J9 




RKT 




C033\'i 




(Abi. ADtmiiis 




CD3SA4 


rilNl 


CALL AODIieSS 




mpco 




ID IlK,CO<il'-g 


; ind of top line 


1I0JP8 




LD DE.PeODIl 


( bettoa of firat lla« 


19 




ADD UL,DE 




19 




ADE UL.DE 




0608 




l.» ti,8 




BB 




EX KL.DE 


J ao<.r«f 


C5 


AGMK 


FUSB BC 




215D0fl 




t.n «i.,5nn 


: noTf to B«xi llae 


B5 




ruSH HL 


, 


19 




ADC BL.DK 




Dl 




TOP OE 




BB 




EX HL.DK 


{ 4F»titatlOB In :>£ 


2B 




lEC IIL 


t bL to DE 


aK02 




LD C,2 


t tv« lines 


01<iP30 




ID DC.AiFB 




B5 


BALF 


PUSH HL 




U 




LD A,(DB) 




cjeo4 




LD B.Ji 


t foir pliel rows ■ 


BPBS 




lUilK 




C5 


BOW 


FUSli »C 




12 




LD (DE),A 




oEoa 




Lo e,a 


, «n. rev h.<«... two 


ni 5n'»tt 




LD SC,850B 




0650 


STKE?CH LD B,WH 


1 lebKtV of line 


OJ 




ADD BL.GC 




E5 




PUSB HL 




CI 




POP BC 




D5 




1"USU DB 




lOBE 




DJXZ Ati^IN 




7B 


N2XT 


LD A,(HL) 


; ririd byte 


n 




POP AF 




12 




LD (DE),A 


; write byte 


55 




DEC A 




£3 




INC UL 


. 


2<}B0 




JH.NZ RSCROLl. 




15 




IKC D£ 




C9 




RBT 




lOFA 




DJNZ NKXT 


; Qeit cfaaraeter 


D5 


CSI: 


rusu DB 


t iBve paraneter addreae 


til 




POP IiK 




CStOBB 




CALL BBGOH 


; T0mH M^r-^fn fhttrmr- t.^r 


7A 




Lll A,D 




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t [ut valne In var.able 


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; recover read sttrt 


EKD A4C3H 







YOUR COMPUTER. FE8RU>inY 1066 91 



The imaginative pen of top Fighting 
Fantasy* writer Steve Jackson brings 
you the complete computerised, role- 
playlng adventure package. 

Your Game Pack' will 
consist of a full length .^gm' 
adventure story and 
the most Intriguing ^ , 



HSIiraSMyTT* rJxiJM 



computer program yet to 
be released 

As the adventure 
unwinds you will become 



*Ttie Swordma^er^, it will be up to you, 

and you alone to overcome every 

diabolical adversary sent against you. 

You'll experience combat routines of 

such excellence you will have to gain 

more and more experience to delve 

deeper Into this compulsive adventure. 

^ ^ Dare you enter The 

Sword master s' realm? . . 

find out in February '85. 

For the Spectrum 48k, 

Commodore 64, plus most 

odier popular micros'. 



SIEVE lACKSONS 



dventurS" 

1NTERNAT(0\AL7'* 



SER 




85 New Summer Street Birmingham BI9 3TE Tel; 021-359 0801 



POOLSWIN 

THE ULTIM.1TE POOLS P.^EDICTION PROGRAM 

• MASSIVE DATAIKSE Pcolc«inn«i ic a«ot>liiN-iK:>i<xl Poolt 
|9ll^lJ(.il(ln -iiil It oimin conplMfnICIllltluwn dllftbts« 
iv>Itb;C - 230CO nticli«!i over 13 youi. The duabiso itpd*i«« 

• riUDICrS Nn( ;i.il Sr:ORi:DRAWS bin <\V;AYS, ■JOMES 
ir.dN'OSCOaES. 

• succE^na seux smsaiuso thai Po<itvnir.or ^iftmu 

tiou^-CL'iUy b&ltci ll'.u cluT'.ci;. 

• ADKPTABLS {'.Oba-lilltlrS Mt iJiVrn ntliTvrry itiduir • 

chcOBC as iTjny s»l*«»nj 4S yoi ne+d to: you: Ixn The 

pr^:4j:M Jir*sd mior fnirmiU ran ho ttA Ivy Ih* i*.*a» /i>n e^w 
d6'i«iOpand ioA yvui own u:>h{i): tntihtiri 

• silVJ>l:4£OA?AE>n-Rr AlinnjIishanriScMBihwamMmes 
ai« Jt iK« prc^iun Simply t>pe »i th« ieter* ncenumimni Irotn iho scrooi Or je« flXOCN 
lo produro lixturDUM unotr.ucaUy (m« below. 

• DISCllVflCROUIUVECOMPATlBU Alv«;ii(>nn(«xc;p('PPlo«tdBK)ue«t>i>ie<l 
on Hp<>. -.Tiih Jirr^pe mnruexons 'or conv«n»»lo dac-rricrodiivoopcuiior. 

(ThltMuom rusjUs arcsuppliwl wihihc pacliacoso thil pr*di«on£cjnt.'jjlunmi:<i.ni'y ) 
AVAlliftiiU; I OK SptHrtrim ('6Ki, Contoodsis 64. WZ'iii .* )«; A.MSTRAD 
CPCtc4. UlCi.A!4:«;itK),v'XKlilbKl Dc.Tjon, Appc 11 3M ^ 

PRICE £15.aO (all inclusivel 








^ I , , I , ,, . ,„ AT IiAST: ?!d m>:e sj-iaij:t>i; lu (iiLi:' o fjMihc 
rTY »kM aA/t 'lOuh: liM mo tlo conpuei. nXG£K !u.-. Ixvn 
J, lAUul 1 \jV J proai»m:n«l wfh iL Eng ish End Sxfl-.:ih 

firnirn: fnr 1 W4.R K imply 1^7* p- It^ IW^ H ft »i* ,1 rrO hf ■ (tJ! '"mrxa* Ucl ii 

POOLSWINNER witbFDIGEK £I6.5(i (aU inclusive) 
Fixgen alone ££.50 



C0DRSEWINKERV3 



CoiTSpTiiw.e: la deagied lo 

allow yoa to cevebp smI ten 

.—«.«..-••••... AA. .».»-.» «-.»-_... y™*' "'" unique trirrem 
TIE mNTEHS COMPUTER PSOGRJIM iy.,.„. n.:.„^„f«,„«ii, f„:„ 

daily-ciw:pap«rsorSpcrajigLi[e Uieiicut :npiiuiill.ii.lcrx<»nbc npuland 
dnaly!t«d.Th(: piog;arn e suppUod witka duabiie deiatlung beil itaniMK'ind 
)oc£eys,and ~((6c of (to dsvn for allBiitiih ccorseE. (Fla & ^aboijl Hint.) 

AVAII AB .VRlJSj.4.7lftu.f*SK. CojiiiM»JjJ»KlBC(»>.&-»9.r. Ai»«(<aK., ^Mtc 11 

PRICE £1 ?.50 (all inclnsivei 




AVAL ABLE (RETUFJJ Of POST; HtOW . 



MM 






Dhone at his SI U ■" 1 *.^ A .< 1 . phme SI hn 

37 COUNCILLOR LA^*E, CHEADLE. CHESHIPE. S 061-428 7425 




SPECTRUM 



THE MACHINE CODE 
SYSTEM 



" . . one of the att loo fewjeuiels of 

Spnr'nin protjr^tmnting . . . 
deserve < a place in every scnous 
programmer's library' 
(Simon Springolt — Popular 
Com:>ut ng Weekly— June 1984) 
'.' . . the uihote package is very 

friendly and easy la o.itt . . . cftn be 

hiqhlj reconmcnded 'or ihuse. who 

(iteJiiSt iboal lo start programminy 

mMcchhe Cocie." 

(Phil Holliday— Ycur Conputer 

-M^y 1983) 

Fully compaiitle with 

MICRODR|VE5/METWORKflRS232 

(vkithtnterfece l)and -nost 

popular Ccnironics mlerfaces for 

80 ccl. pr intoul. 



AMSTRAD 



THE MACHINE CODE SYSTEM 



P 



P 



ctB 



* Bo:h proorams in one package 

* MiKjy HEW FEATGI^^ 

* Compatible wilh CASSETTE and 
DISC 

AV?\1 LABLE SHORTLY 

* Send aA.E. for fully detailed kaflel 

* Avoiloblc 'rom many conpjtcT 
shops, or by FAST mail order by 
serding acheque/RO. tc — 

Depl YC, Pictureique. 6 Corkscrew Hill Wes- Wirkli am. Kent nR4 93D 



CTURESQUE 
CTURESOUF 



92 VOUR COMPUTEa FEBRiJARY 1985 



TELSOFT 



A reminder of how to use the Telsoft service. 




.^..j, 



The programs given here wil. enable 
Spectrin! and BBC ovncrs id download via 
Your Compu:fr': Telsoft service. First type 
the heslooder fof your michir.c figur; 1 — 
and then enter I'.ic machine code — figure 2. 
On ihc BBC ytm call the service by entering 

CALL &5A00 
while Spcctnim owners must type 
RANDOMIZE USR 60000 
So far OE Ltd's Telen.od 2 rnd VTX 5000 



modems have t-een tested wjh the service, but 
it alsi) workb. with a jiuinhei tif other maices. 

Tc find (xu whst is available on Telsoft and 
how to receive aoftvarc dial ap Colchester 
(0206) 806fi. This audio recorded itifoTnjtion 
line will ;ilso adviss you which telephone 
numsert ic ring for ihc 3(:0 »nd 1200 bitA 
ser\'i;es. 

When a proj^raai yvtxi want tn download is 
avaihhlcj n-akt sure yout modem is set up and 
dial the number appropriate to yoi r modem's 



speed. A^ soon is you hear the modem cones 
switch \tit modem to line and replace :he 
receiver. Select Of;tioa I frcm the tntnu — 
Roccirc. After u bk>ck of (lat;i is received, you 
will see "OK" primed if tiorc were no errors, 
otherwise the program will wait for ihe blocks 
to :onic round again. 

When the "Prograrr loaded OK" message 
appears return u the Tels(.>ft uie lu uiid bclet^t 
Option 5. Vou ca.i now save and rtn he 
progri.m. 



Figure '. BBC. 



10 Rm !:»: HEX code: uad^ 

19 (XSlFRINr 

3B IMPUT - STWT AOOMSS IHcxfiA* 

9» It nM.*F07 TiiCK roe 

<e If A<t.VAte CR l>>l.6f«7 -HCW 28 



7«l P«INT •■rt- "1 
Se INf>IJT -:" B*,;* 

fit Ih LI:N(B»: 016 1HCN 9a 
loa T->» 

I ICI For H-9 TO 7 

ize x«- ni9t<t*,2>N>i,]i< 80SUB see 
isa ir c-i 1H1N 2M 

I4a «•• ntnt»*,dtH*i,\i. OC£UD 3*t> 
isa IF C"l TMCN 2M 



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tee wexi 

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:iB IF E -I TitEN A<A-lt GOTO 2M) 

;>IB l^ I- t./««.l-|r-*C»> THtH Ifl 
:4B M»I».T -CHECXSUHEFftOR '" 



330 AB0-oieoTa se 

260 PnWT 'TVPING ERfOR " 
2/t> A>-B*<A DIV 8>.GOTD M 

3aa •G/Mc 'OQ^MiaAO" ^aoo i,ru7 

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3te IK Asc'.xtxse them RtrufN 

320 IF flSClJ(«)<*3 IMFX F-lilTTlWH 

330 IF A'U::t(*>.>7l THtN E>l 

340 RCniRW 



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Figure 1. Spectrum. 

3 REM ahrcTmm 40n tig 1 

IB REM Hex Code UcudlH' 

IS CLCAK SSBM 

30 POKF 73^50, 8i e.S I PRINT 

38 INPUT 'St*r- Arilrn.* -i« 

SO IF <<'61135 'Hett GO TO 760 

ha !F <:b«eBa -hen oo to so 
70 mim at 



90 ]M>LT * I -lb* 

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130 IF E-1 ICN GO TO 260 
I40 ^T >»-k«l2>n*; TO 2»n»2» 
145 50 XIO JOOl LEI ¥-*■•>**« 



134 IF *-. TICN iO TO 2t» 

178 PtKE 4,yi Let «-••! 

iiM LCI ft*yi WXT m l.rr »-B 

19« FOI w-l TO 3 

Saa LET x<«b«tl7t« TO I7>a> 

305 00 3Uf 30«i LET r-¥*l**» 

22a NEXT ■ 



23* IF fv THCN PRINT 



•jbll (» TO SO 32B FtnUTN 



240 FfilN" "OieciiBtKi Error" 
TIO L£T 4'«-Bl «] TU 30 
2»a MINT "T^lno Error" 

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6a,!00 :6FEFGe2ei33C:ail,32£ 



BB2CU tteF.E12133eeei2CD,340 6V440 

40216 !U7ttCI>Ai£CC3AAeA,6Bl 6844B 

602:4 tcoiraoMAAMi'^i'o.aie 6a43« 

bO?:'? :fFBC2aC121ESCEM.334 6»464 

6e24B I onerntxv sce«>C67 , 3CC 6»4/^ 

60248 lS£atBE2aBBC0D7EC,40F 6646? 

o07:6 i»:2132S«5CC3FFEb,4El2 6«40e 

<,02t4 i]E083Z6rEF337eEF,3C7 6«49t 

«07->? >ci>sc^iKri«;«M:DiF,4ac <.a=o4 

oOTFO :rDDFAACA3273EFCD,634 6031? 

ea2ee i(BFr3A6aErrceo2e.^6 6052e 

o02S6 i«S3f6<?f-TE6»»3:A'3,432 6052Q 

00384 j£Fi;i30C3AftAEFfi9.:7^c 603^. 

00312 iTOOCCOlFCDQAAAEA.mB 6R^4 

««3ao t216PEFBEC22DEBCD,aS4 60S32 

^3^0 t .FbtOAA*EA-.;i70EF.SA2 />e36a 

«0336 !lt£C221)tB3t«^i2t2,3»9 6036« 

o«344 :C^.3C6Il3t^e3eE3£Ml,4<n9 6*576 

s«3S? .J7F4FF3*(«»CFE2l,a81 60364 

sOSiO l?BOSr-r>l5FFCDD7EC,5B3 60392 

oosiO iCDA(£C2 EttEESA^a.ais 6«6ae 

<«J76 :crozar3Eeeeca7ia,4^^ nontw 

0031:4 :Da2SESEEED4B66eF,9>l 64^16 

oa3';2 :0C7U-EO0C2H)EA!3.4FC 60624 

ae4ea :0D2Cr63EFAa>B4E0.3I9 68632 

>,n4i>n . tpnin-<f:EC766COCD,^o ^a^^a 

l>D4)6 i FC03e^K3IOtAf3.S94 60640 

«0424 I D&03AFD;4naF03C , 300 60A56 

60432 •40DyF3tFF03FF3E,S6F 60664 



:3.D3fr3£BF32aF3C 
I 32eD3i;374f«3C,3F0t , 
l03FE:i9liiCCB»eFi 
1 C»«FK:3«6£:/!CD 15 

■ tcCUtM- own lD3Ft 
: 21 6Se£3e SnCDBFFC 

: c:>B4cccoA3£a:iMu 

itL:iitD77CCCIJ77EC 
. c>nBfcC<:ps4ecx:oA« 
rFC23:SE«DC0»U;CD 
:aiFr.?:\CD*3tc;3eoj 
I C!>BFEcr.o«4Fa:9co 
; A^FrT«7rr»nFFrpp 
! B4EC23C9'»EFEB0C8 

I LeBBeD23C304ecFE 
: oeceF53e2ocoeB£» 

: F : 3DC38FECCDAa£C 

> r.tA3CCCDA6CC3£eo 

1 ClIOOEDSf FF37flC5C 

ic»FSi3E4roc»iFr.» 

: IFCBlFCB.FFftSeFE 
: ,»M'nUitL-C607l213 

■ F E60rF6Mfe3nF* 

!D4Frr6a7 2i3;92t 
t Cft£EEM:oa4FC-; i B6 

• 173E2377i310-CIt 
lO07/C9E32l70IFA£ 
! 7'CSeEOe'EA7C0lT 
:3ea07ECEM773A6r 



.3€B 

.2SB 

3^B 

,s:f 

,St6 
.442 

,a;4 
,seF 

,6£1 

.4ty 

.4SB 
.54,1 

,37n 

,631 

S2a 

63) 
3A6 
,S74 

,6ac 

,4<y 
.4TO 
,606 
,*t£. 
,69C 

338 
,449 

,3OT 



MM72 :EFeei»J26FtF3'2I.31>3 <S0904 I t73£BB0/FlEIDlC I ,610 

ftWna W£FCtll623C0 1 680,330 609I? it'JFeB72tlCF-CB:B,4F3 

6a4«H :?0F7r.l^ir.<il 10301 .394 60920 ll9FFBC2Cl4FiOB5B,388 

6Bi96 :2UA0»:DPr03r»3e.32F 60920 l ltlFF(in7f OCrtiBFA . 3<.7 

6«>%)4 :V6J.;//t:H;i;4/tl«>A,32V ^ffl93o ieFEt*fcUKK«llF.E:E,4l»A 

60JI2 :2EEDri;3AtEj1CaAC,SCO {0944 , eOOJEOTCJt J6B«D,32C 

6a>2B .fcD/W6»lFe02D3FE.54a <e9S? !3FO7rnail63£1032.1C4 

60-.20 :A#il//=F3;Z«a737,2FC i^f^ l g9t«:C93f 1 7! »BlCD, 302 

i.4>irrf, .C^CC77Cl>3«OC*CO,Ul'» tBV6i 1 1 1 Z2C93E 1 2 1 iBOOl , 757 

60)44 :47EFDO^£C£C03>C9,be6 ta^7, 1 Jl22C9C2D5ES3Ea2,3EB 

60J52 F3CBFFSAeiEFFE0O,5C7 <a904 l CD4ai ;6eB47eE3aFB, 451 

60760 2fle43E56l602SE37,ie7 40992 1 CI»CEEE1DIC1C93A,3CU 

t^i/.n n:^FFrniJCFir<)F<i-^A,j.7's 41B<m .^oecco<•x-^ooc3<^«D,iMl^ 

60>76 eiKFFEa026O43e36,376 eiOOO . 5CFS21 SEHCCFIAFFI ,4C3 

60764 -B3FH.05aeCFIC93e.644 dlOlo :fl7C9J7C9FSlllO(»,3BF 

60792 :0O[»FrE6OBS7C8O»,3'». 61024 1 CDlBfDFlC9444FS7 .4D6 

60600 ;FFFAfl7t7rnonrrr/>,/.7A ^la.'^'' ,4F4r-«-ai«ji*»4C47,2»4 

60006 !3B'.Ua4DB7FA7C93A,3Ce 61040 : :«4D4S4E^34M31 .a),'2; 6 

6aC16 l01EFFEe02aD43F37,J97 61048 ■ ?07B374543454'J56, 2?6 

60824 ; 1B023E36D3FF0B7F,432 61056 i •lSBOi37B7«20457D , 2 ; 7 

6B«32 tC9C04/ED3A73£FDB.50E 41064 : 69742e74^2«426l .320 

6eC4e ;riei66L«-3Ji:U:30,!3EE 61072 : 7369430028205973,21^ 

60640 :7aFDriC9Cl»C£»30.6-2A 61060 : <C2O337%0626F6=,3'>3 

60636 !20FAr.9CST)S:5rSFE,7eO 61000 ■ 2033486966742020, 3«8 

60664 i7F»l3CnF9E0FT0C,537 61096 1 2047«a/46F-.«)3265,2t9 

6111172 l2B<CF£BI>2iain5£^ia,.ntM ellM« I /*/£l,:<6L:iV746<-2',3VC 

6O0e«l :D7:iEa0D7101O3E2a,34F 6111? I 4l)43'^F?SZe2<''004S,2rD 

60e8H :0/3eOB073F68»:FE,4EB 61128 l 'ie54'S57?a4EK!40,389 

6aC96 :212e03SEaED73£SF,2E6 61128 ; 424SS22ee«aooaoa , 1 C I 



YOUR COMPUTER, FEBRUARY T985 93 




Figure 3. 

i2i 1 5 3 4- 5 6 7" 5 9 M ^ 



•FP 



; — _' T 1— ' w >• '_' :? n !_' — • 



i-: 



r, 





SYNSOUNDS 



'Vws i'KOcjRAM coiivirts the 48K Sinclair ZX 
Sjjcciruin into a vcrsaiilc elccimnir kpylv>anl 
Up to 100 dillereiit sour.d •.•ITccis can \:x 
Kynt;i<:s.scJ by ih^ user, nnj' 10 of which caii 
te accejsed in>iaiuly wl^ilc playin:; a piece of 
mus.c. In addition, seven rills can be Morjd in 
ihc incinoiy and iiuoTrorntiu! inrr> t}*i> 
f crtornance ai the touch or a key. 

Facilities on a main nnenu 

All the facil.iics olTcrid arc obtainable frcii 
r mnin menu dUplay(*<l n tin* si;m (if ih<' 
(uoi,rai:i: 
■ riay. 

B .^ynlhcsisc sound clT^cts. 
I Assii>n sound cllccts 

I CoinjKiw rifls 

Ptay: When this option is selectee the 
screen is cL-ared snd the co)Oj)uler keyboard is 
irraiged a-; ir lipirc 1. Ihc labelled keys in 
the middle two rows an: set out .ike a piano 

rnd r:m Sn phtyod in a simihr in-j:iHiar. 

However, thivc octaves are available since 
pressing Ouiavc Dovn will lower all not:;s hy 
one QCiavc and Jctave up will raijc diein. 
Hours of fur. can be had fion: il.is basic 
tluctroiti^ kcvbturd. c-.'cn if vcur musical 



talent is strictly hnii'.cd. B'lt here's m.ich 

ninrc* \t\ roiri' 

Synihe.'isc wund effects- The essence cf a 
syithcsiser is to alter :he kind of sound 
prxluced withcut altering the musical pitch 
of the no:es themselvev. On t.ic Spectrtm his 

C'i:i bu -jchiuvcd by C-ju«ing u r-j|>tJ eh;n{r« ot 

frtqucncy as the note is played: :he particular 
"frequency '.vaveform" governs the character 
ol'lhc sound emitted. In this program the user 
is able lo invcnl as niiny sis 100 unique 
frtqu*nc7 waveforms .is follows 

On choosing menu opion 2 you arc Crst 
required lo enter the number of he sound 
clfcci you are aboui titsynthcsisc. 'Iliis should 
be within the lange 0-95. Having done .his 
two axes w;ll ipfear or. the scroon — set: 
figure 2. 1'lie horison.al liin.* axis jov^rs the 
duration of the nine, and is divided into 16 
sectors, wh.le the v.-rtical axis represents 
frequency. 

Beep returns you to menu 

To draw out your frequency wavcforni keys 

6 md 7 are used to niovc a bur up and down 

caul) sector and key enters the desired level 

^continued on pig& 97} 



Sound E fee's 
I 



mQmmmizjLzimci 

Zl EEl B E3 dl [ 



□ 



OCTAJF 

DO\,W 



□ I 

E 



3 



\i/»-p'\ 



1 



][ 



HQEHDnn 



F!-CAPF 



][ 



ill 



lY 



IC.TAVc 



K. 



J 



Riffc 



Figure 1. 



Tim Closs provides a 
useful facility on a 
machine not noted for 
its sound potential — 
the Spectrum. 



Code }. 

-IQ6S 
31973: 

31933 
31557 : 
320aS 

jaQZl ■■ 

3203" . 
32CJ.5 : 
3iOS3 1 

32C6I 
35069 : 
350 7~ : 
3203? 

£2093 : 
3ii31' 

C2109: 
2 > -^ i~ • 

32 IS? 

Code 2. 

33763 

32776 

32734. 
32792 
32300 
sosos 
3£81c 
3285A 
32S3£ 
3£Ci 4.2 
32S4.0 
3285= 
3236i 

32883 
32SS3 

3255S 

■32912 

■32 920 
32923 
■ ■id'~i'J,t> 
3294i 
- iqcs 

:.?96Gi 
32963 
32575 

1 .J uC3 
33015 

Code 3. 

3 + ^co 



2;O05e.O5eD7E23DB = 560 

F£fi62S0iS3aaFeC9 = 562 

Jt ^•-.■e»-itbt)li:ill = 9S0 

3£Fe:)eFEE6Gi231G = 1376 

5ce63Ci:i0Fji:i3 = 4.9a 

0T5s^el■3iCi^r:•<l3 = 4S9 

OS4.Sa:H^=Lf-'F'3510fiF = 525 

5SD54.EB92303C54.1 = ST = 

i:iC"CiC13E32BBDC = 1(309 

4.c^D3=C3£3C323ES = 1095 

2aifl3^4.5C60;^E:-<Lfl = S79 

5E235c23»62;4Ce3 = 53? 

63CC'B5Ci3clClDl£:3 = 1143 

lCCFC;-i!li3OC90O0P = "'f* "^ 

0eOe0021=4.3DO6G)R - 465 

7E2?DP.rE-e25e523 = 3£0 

ieF6i=L2CSC5206S ^ 645 

S6O03iF5='3E:-lfl5E - 320 

23S6ErS3FEFF£l-:'Gi = lUSS 

87aS07"'££3D3FER6 a 545 

2SO4.23iCF5C50SC£ = 750 

iccssacsiocBio.is - 309 

360^12 1'C'fEjAHOe = 617 

ie3EFFE;EC54EE5Cr = 1227 

CC0F7£'Cl£l£3ieFl = 1055 
3C0C - CCl 



BF04BFaarF03BFie = S32 ' 

OFlOFtJUJPBlOFCOc - 1025 

FC'04FBO4-FD02FBO2 = 1020 

FDoioii)«:?F£oco-0e = sie 

360C02OO£SOeO2Oe = 214 

R6O902dOlFQ9O2Oe = 224 
9fl0802C0iD03e2ee = £03 
fi&0702()i:i3 5S70 3eC = 235 

OCO603Ci0E405030e = 209 

60050-3001 105040C - 130 

C70+04i>0£00404OC = StS 

.ico4.o-oorri3^f(i5©e = 533 

C40305eOiCO3(55Oe = 352 

530305e02603e6eC = 1<.3 

F70206e0CBO2CeOG = 466 

Hiwiiu f'ow! 'HtjHk; 'oe = 301 

£402030031020602 - 1S3 
lw0209?0Fi0i09OG = 273 
D3OlOflO0B734,oaoe = 416 

yL-uieByi3i40ieuoe = 3 14 
6C0i0CO0s6ei0DS£ = 221 

4.10iOEOO2£eiOr0C = i-s 

1601Oi^ii>0UA0iiO0e = 70 

P9OC'llO0£9e0120t' = 5.7 

C>H00i3OeiDOO15OC' = 463 

c:F00160OE3Q0OC0O = 39ti 

JC00e0'3Cf F3SEF04 = 4o4 

H = 05Ei=i0F7i0F-O3 = 102C 

~~O4F732F7O1EF01 = 9-33 
40813.051 = 3 7C 

-F027FC47F037Fie = 535 
r£10F=eSFEe}4Ol0£ = 753 
<?:04 = - 



YOUR coMPurEn, rCDnjAnv laos 



GANDALF 



THE 
SORCERER 



TVI 



COMMODORE 

64" 



ENTER THE MYSTERIOUS WORLD OF MAGIC ! 

With dazzling graphics, super realistic animation and awesome 3-D 
effects. Gandalf gives action you have never seen before in a computer 
gome. 



> 







pre 



A Super Act/on, 3-D Effect, Arcade Game 



Gandalf, a one-ployer, 3D simulation is part of TYWACs GA/^E seres. Fast orcode action combned with dazzling, high 
resolution graphics and sound ejects puts you right in the gone with an impart yoti n^vrr thntight fiowiblc' 

A nan's home is his castle, but to you, Gandalf the Soxerer,your castle is sacred Or so you f hougit until thescalytailed lizardmcn 
tcok a fancy to your treasure wnich is pro'ected oy an ancient spell. 

Your cnstlR !<:)mHAr<:oig9. From the dictant{or«stcomo waves of attac4ing;)limy creatu'es, all L>«nt on abducting your cippi entices 
and Kolcing them for ransom. If thelizordmen get all three apprentices, you must yeild to tieir greedy demands and release the spell 
on your treasure. You cast your powe- bolts, amihlating 'he attackers with a blest of fire, but jtill more come. Your nxjgic power 
drains and you climb the towci todicw iiioie fiuin the shining star But bewore the deadly spider. If rhe lizardmen finatly break 
down the castle door, you nust battle them throughout the castle. And if they do kidnap your assistants, /ou must chose them 
through the woods before the creatures drag them, kicking and screaming, to Lizard Lctir 



AVAILABLE FROM: BOOTS, W. H. SMITHS, H. M. V. RECORD SHOPS 
ALL GOOD SOFTWARE DEALERS AND ALL OTHER LEADING SOFTWARE DISTRIBUTORS 

WATCH FOR FORTHCOMING RELEASES 

INCLUOIHG 

TYPE-SNYPER ..o BIO-DEFENSE 

SPCaRUM VH?SIONS AVAIL^BlE SOCN 

TRADE DISTRIBUTOR ENQUIRIES INVITED! 

TO ORDER BY MAIL »>& P FREE) SEND CHEQUES OR POSTAL ORDERS TOn 
TYMAC{UK: LTD 4348 MEW STREET BIRMINGHAM 021-643 8893 




Listing 1. 

5 LORD '■"CODE : LDfiD ""CODE 
POKE 65535.123: POKE 65So4-..4-S: 
50 TC 1^0 

5 POKE 2565o,S 

103 CL£ : PRINT 






N>::XT 3 
'■'£" . "Dtt'- ,"D" . '•( 



}* M 



-^-*-v ^i^U'LNl:'Cr 



A--^c 



-«..-.-. .--V.^ 



110 PRINT : PRINT "(i:! PL^V": P 
RINT : PRINT '-(£:< i^55IGN FJNCTIG 
N KEYS": PRINT • PRINT "iSJ DEFI 
NE SOU'JDS ' : PPTtiT PRINT " (d.) D 

EPINE PR0QPftM5" 

t20 If INKEV$="1" THEN GO TG 20 


130 IF INKEY$='2" THEN GO TO 40 



140 IF INKEy$='3" THEN GO TO 60 


145 IP INh.Eyi-'4" THEN GO TO 30 


150 GO TO 120 

200 CLS 

210 LET q=U5R 31855: LET fl=U:3R 
32080. ir INKEY$="Z" "HEN GO TO 
1130 

220 GO TO 210 

400 INPUT "FUNCTION KEY ? : 1 TO 

10) ":K 

405 IF K=1S THEN LET K=0 

410 INPUT "50U-4D NO. ? t0 TO 99 
) " ; E 

420 LET H=330724 tE^16) 

430 POKE 33016+ (K*2) +1 . INT (H/2 
56): POKE 330 15+ *K.*2 ) , h~ O! INT (H 
/256: J *25S) 

440 GO TO 100 

600 CL5 ; INPUT "5QUNC NO. 7 CS 

TC 99:1 ".:N 

610 LE~ H=N*15 + 332)72 

620. CLS 

625 FOR G=9 TO 21: REPD = $ PR I 



&2e DflTfl "i 

C" 

627 RESTORE 

628 PRINT PIT 6 , 2: "0i23456789fi5C 

538 FCR X=0 TO 15 

6.4 S :_£T 'v=21 

656 ^-PINT fiT Y,X-2;"1" 

to55 -=hU5E 

ee-u IP INKEt$ = "6'- find Y<2i Ti'LH 

PRINT RT Y,X + 2;" '■ : LET Y=Y + 1: 
GO TO 650 

670 IF IhKEY$='7" RMD Y>5 T4EN 
LET Y=Y-1: GC ~0 650 

56i3 IF INKEY$-;;!2" THEN POKE H + X 
, (2i-YJ +12 : GO I U 539 

685 GO TC 6E0 

689 NEXT X 

690 REE? .5,10 
700 GO TO 100 

800 CLS : INPUT "PRCGRfiM NO. "- 
(0 TO 6) " ; P 

803 PRINT RT 4.0:" PROGRAM LENS 
"H - TO 15 N0TE5" 

S04 PRI NT IT 7=0:" fflSIBG iSM^Mi^ 

605 FOR G=5 TO 21: READ 55: PRI 
NT RT G , ; 5$ ; H i G ■ £ ^ i $ : H T G , 16 ,; 5 
$;R~ G 4: 121-6;! ; fit G . 12 (21-6) +1 
2;i=i~ G.20.: (21-5.' +2.-1 ; : NEXT G 

S06 RESTORE 

60^ PRINT AT 15.2:2; IN'JERSE 1:" 
i YHt ■ Htr!^' ■• ; H I lb. 23; "TO END" 

810 LET H=Pt15+34686 

820 FOR G=H TD H+15 

525 INPUT 0. IF 0<0 CR (0^36 AN 
D 0<2;255:' THEN BEEP ,05,20 GO T 

£26" IF 0=255 THE'^i P3KE G,0: GO 
TC 1C0 
£30 POKE G,0: .NE:<T 5 
c40 r-.O TO 100 



(continued from page 95) 
vvhtn It Ls R'ucticd. Afic levels, ii <jI! 16 
icciors have been defined in this w:iy, a shun 
beep returns you to ilu main iiieiiu. 

Sonic examples of vvMVc:orms irc dupicud 
in r'lRurc 3, but you will obviously want 10 
t:xjx;iiaier.i with your own ideas. 

Assipi utund cjfe:ir. Fioni your bank of 
frcaucncy \v.iveforns ptodiiccd in menu 
option 2 any 10 can be choscr. for i:i$t£nt 
recall at the i.nidi of a mutton Si;np!y type in 
a njin^cr from l-IC, fcllowcd by ihc ntjmher 
of :he wavebrms. When you iww p]-..y tlic 
piano kcyboird, each nois will take en tlie 
"flavour" of the sound effect chosen, Pr.;ssing 
another of th; keys J-IJ will change to a new 
sound eficct ^vttAoui interrupting the tlow of 
music. 

Play sequence of notes 

Compos-: njfs: It is often necessary to play a 
short riff — sequence of notes — which is 
repeai-'d many limes and may be complicated 
or t-sisr. Synsfinnds allows up to seven lifTs 10 
be stored iimuliaiieousA' a;id then repla/edby 
pressing a sir glc key. It is thus pissible 10 give 
a creditable musical performance vith a 
[niiiin:uin of ^taniina and skill. On 'he 
computer kcyb.iard in llgure 1 the keys 
labelled (i) to (vii) in t"ie boiiom row refer to 



these prc-piogramme:! riffs. 

After cnurir.g ilic number of tKc rifls you 
wish to coirpojc (0-6X the Spectrum will draw 
up a chart of all the notes playable — threj 
oztavcs. Each note has a number 0-36 — for 
the lowest C and 36 for the highest, and it is 
iliib iui.iIh:! iliai vciu mu.si enter to place tiK 
desired note in the memory. Up o 16 notes 
cjii be entered in a single program, but i;'lejs 
i':ian this number ire required t'len typing 255 
vill complete the rift* and return you to the 
iiiuiii niciiu. 

Lcngcr noits Giii be entired by repeating 
tne note several t,mcs. 



Listing 2. 






5 


REM cpcc. ruii hex loader 1 


10 


PEF FN K ih$) sl.6« (CODE 


■»»ll) 


_4.e- 


7 Rt^D h»a) >"9-n +CODE 


ht l2 


)-46- 


• t7 firJl> K$l2) )"9") 




28 


INPLT "siari ■• 


£ 




30 


INPU- "finish -; f 




4.0 


FOR n=s TO f 3- 


EF 8 




50 


LET -.01=0 






60 


PftIN- n. ■■ 






70 


INPU' h$ PBINT h»; 




80 


FOR 1> = 1 TO LEN 


h» STEP 


2 


90 


LET :=PN h ih$) 


LET lot =tt>l 1 


100 


PCW-E n<b.; 






110 


LET h$=h«:3 TO 


) 




1£0 


ME/T b 






130 
T I 
140 


PRINT •■ = •■ , . 


CNFUT I ; 


PR IK 


IF loi ;; t TbEN 


PKII4T ■■ 


in:>Ut 


errjr - lr\, a^dm" 


GO TO 


50 


1S0 


l-iEXT r. 






160 


REM £r, icr STOP 


te Slop 





Not; i.iat the r.fl' wif. be played in the 
cu.-rcr.t vravcform, so he 'flavour' Df the riff 
can b; aSter.'d by pressing inv of th; keys 
1-iO. 

Sou.nd priidujed or.ly by the Spectrum's 
internal speaker will rarely be of sufikietit 
volun.c, so dmplifiCincion car be achieved by 
connecting the inic soctcet on :he tape recorder 
to the mic sock;:t on llic Sptclriui and p.ish 
down the record buttcn en cne "ecordtr. 

Entering synsounds 

To enter Synsounds, I advise (he following 
in:thod: 

1. Enter the Basi; program from listing 1. 
Save it by typin.j: SAVE "SYNSOUNDS" 
LINE 5. 

2. NEW the program. 

3. Type in ilm Busiu jiuytct ii from lidtlng 2. 
Type in ^un. 

4. Erter the cod(r trnm liRtino .'^-wnrk frorr 
left to rijht and from up to dojvn. 

5. Save the code directly alter the ttrsi 
Basic program by typing: 

SAVE "OODE 1" CODE 31965.204: SAVE 
"CODE 2 + 3" CODE 32768,1922, 

6. New the program. 

7. Lead the finistied program by rewinding 
the tape and typirtg: _OAD "SYNSOUNDS". 



VaUR COMPUTER, FEBRU'VRV 1935 9/ 



mUSBROADEN YOUR 







NOWAvailable 

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P J Goward makes 
beautiful music 




CBM COMPOSER 



HAVE YOU SVHR inctl lo in:ikc j sounJ using 
lie Coinmoiiorv 6+? If you liave ihcn you wiil 
obviously hav.* cxpericnccJ .iiucli of the 
fru$Ti<)(ion caused by the bcwililcring array of 
Pike cmiMnunds rc({ui:cd lo a:ti\'at« its 
powerflil SID chip. Even mukin^ a feeble 
beep is no sin'.ple matter, requiring 3 
mininiuDi oJ'fcur pokes, ihii h, o' course, if 
you can underatand the poor cocunKniation 
providec wiih the machine. 

Jf you are one oiihj niany people thai Xdv: 
parted wiih tie £50 rcquirec. for Simon's 
RaKic then you will have no loubi seen dsr.ap- 
paintcd with the very poor sound conmands 
which \viU only allow n.usij 10 he pbyed in 
o.je vuitr. liowcvcr, ibr .he rest oi'the Basic I 
hive fev; ccmplaiots. 

AH souncs have one mair. ccmmani to ac- 
tivate t;ieiii, o relieve complications that 
could ()ihcr.vise arise, and also, >incc a.l sound 
generation is conirotlec by niicjopioccssor 
interrupts, basic programs will stilt continu; 
10 be cKcc-Jicd while ihe sound ia ployed. 
Facilities are provided for harmonies to b; 
playtd in ill three voices, and eac.i voic; 
allows tour nctes to be buJered ant; svbse- 
quenily played, 

'I'hus a djra:ior. mjst be ^pezifi^d for soch 
naie eliminating the time delays required by 
some ccmpuiers "or their sound. The com- 
mands allow for all of the musical waveforms 
and modulations cf the cnip to be used as well 
as the prog.'animable filter. Tbi: w,idih oflh; 
pulsL waves' };enerated by each .-oice may also 
b; pfogrammcd. 

All ofrht commands ire of ihe form if an 



extended SYS st^itemcnt, here 380Z users vilt 
notice a similaiity with RML's Call com- 
mand. The routine .vork*. by f\:di-cciiny every 
SYS staterneni just -scforc it is encountered by 
the basic interpreter, and then, if it is of ihe 
for.ii d'au extended statement, it redirects the 
SYS call K) t le appropriate sub-rouiine. 
A fiinip.c example in 

SYS "VOLUME". 15 
which ses the total output voiurae for all 
three voices, it'* parameter should bein ;he 
rar.ge , . 15 where is silence and 15 U nwx- 
liium volum;;, ony value given t.iat is greater 
than 15 o.- negative will be sctted into the cor- 
rect range. After setting the volume, ;nd 
before anv nctes may be played on a paricular 
voice, a SYS "ADSR" must be made. This is 

of the form: 

SYS "ACSR", voles, attack, decay, ststein, 

fetease 
and dctennines the volume envelope for my 
note following on the specified voioe. 

Voice should be in the rangt 1 ... 3, a 
larger value will be scaled .ntc this range but a 
zero vill gi\Te an error. Attack specifies :he 
rate at which the sounc reaches i-*s maximum 
volume, while decay governs ihc rate at which 
the no:e decr«oacs in volume ufter ii:i uttack se- 
quence sustain specifies the volume lt%'el at 
wliich the nojc is then maintained, and iinilly 
releast gover.is tlie rate at which ihe note falls 
to zero volu):)c after its duration has ended. 

Thus 

SYS "ADSR". 1,0,3.0.0 
will set for voice 1 ihe .liniiliar harpsichord — 
lyjie e:ivelop-\ v.'hik: 



SYS "ADSR' ,1,0,0,15,0 
v;illset for voice . an eiivelope which instant-. 
ly tcadie^ its cia.vimutii vi)l iitic ard Vv'hen ihc 
r.ole has finished it will instantly d:cay to zero 
vohune Ecch of the .Inal 4 ADSR paranx'ters 
."thould 3€ ;n the .aii^e . . .15. 

Once a v.»ic<, has had i:s .ADSR envelope SJt 
iaiy iiuiiib«;i u'siotiiidik may be playce uu lliat 
voici with the conitr.and: 
SYS "SOUND", voice, wave, envelcpe. fre- 
quency, duration 
Voice may take the values 1. .5, f. .£, 9. .11, 
13. .15. 1..3 do, as you might expict, just 
play or. that specifud channel, Fiv;; and ft 
wt>rk for voices 1 and 2 rispjctively, and allow 
syitchrcnisitjon of two notes on :hcse 

channels. 

T-ms after n channel :>f five- lu>;! been 
Specified t.^is note will not be played until a 
command to char.nel 6 has been executed ard 
ther. thise two notes will be played together. 
Channels 9. . 1 1 have a similar function but 
synchrcnisc three-note chords together on all 
three channels, 13. . 15; before they play the 
note specified, flush :he sound butVer for their 
jiespectjve voices, 1, 2 ar.d 1, and the note will 
be playjd disregarding jny pr;vious note en 
that channel. Wa/c jcis the sound wave to be 
used: 0. .3 are trangle, sawtooth, pulse, and 
noise waveforms. 

The envelope parameter may take the 
values 0. .3, specifies :. pure note while 1 . ,3 
trc reserved tor the pilch envelopes — see 
"eni^eltipe" ccmmand. Pitch rray be varied n 
the range 0. .55535 in increasing frequency. 
(continaed on next page) 



YOUR COMPUTER, FESnUARf 1985 £9 



(con'initnd from pmvinu.'^ P^gc) 

The specified duration shduld be in 60th's 
of a second, when usini; altjrnitivc interrupt 
routiiicii to ;h(He provided by tlie nr.achinc thb 
may alter but normally it will b; in60:h'< ofa 
srrnml Th ts f Hurationol^O v/ill last Toi one 
second and 40 for half a second A duration of 
will last for a very long line: approx 13 
minutes and is best avoided. 

Before uiing thi: jiulsc vi'avcforin, number 
2, it is best to use th? command: 

SYS "WIDTH", voice, pu se v^idth 
This specities the puisc .viikh lo be used by a 
spec tied voice, A width of 0, the defau.t on 
s'.vitch-on, caniiot be heard very well but 250D 
gives qjitt' a nice :on;. The pulse width 
should be in the nnge .'1095. 

The ncx: command is prolwhly the most 
complex and needs expeiitncniation fcr one lo 
be able to prcciicT it's effects with any certain- 
ty. It is ofihe fomi: 

SYS "ENVELOPE", lunber, timiig. p1^ p2, 

p3, s:ep3in1, !>lepsin2. stepsin3 
Ntnnbe' should be in the rang; I. .3 sptcify- 
iug one of the three available p.lch envelopes. 
Thii nunibur idiou d silao appear in the 
eriveiope position of the sound commatid if 
the envelope is to be played. 

The second paraiueicr specifies hiw often 
the envelope it lo be ipcaied ir. 60lh's ofa sc- 
csnd from t). .127 but if 128 is acdcd in th'^ 
number then the einelqie vvif automat ically 
rcj>cjt itself once ihc 3 steps have finished, 
otherwise i: w.U complec the sound -.vith tlic 
final pitch Mayed. Then ilu next ihra: valuts 
determine jvImI h to be added or &u?trJCtcd 



from ihe current piich value being ployed as 
oftin as the liminj; allows. The three steps 
determine how many times each of the three 
pit:Ii values arc to be added or subtr;:ctLxl each 
step. 

The fiiwl lornmund dca'.s with filtering end 
is of t'le rbrn: 

SY£"F LT=R', voicc(5), type, cu:off fre- 
quency, resonance 
Numbers 1, 2, 4 each correspond to the three 
voices 1,2, '.. To fritcr more th?n once voice 
each cf the ituir.bers for tic asscciated voices 
must be ;ddcd together, thus seven filters all 



Program 1 

ti in*- ^ * i><t^i.-«r I 
V ri*.iftr>.i m 



■-»!• 



•:-wW'»m 



Ittt t**B.*»'^#**»— »■. 

ttM ^iFi- .^'«*"**« *»»i- » »»nwHh^ai'*****<«i» III i till niifi ail 1 1 
FMfl I'M'-**! :«t4*<> ^%*«4k>* 

tm •••••*"'»•»»«#■ 

fin- »•»."*' !•. t» <>«'■»**•'•*■ .ktfc' ■»*•• 

•rn !■*«•■«>*« f'««<>t«i*» •*!» 

5»iy:CiH:S>*4jl^t451ji •*■''••■*•••*• "•.•••"•^« iM^i.tt*.** 

'■•'■"'^■•"■•►"■"•••■l.W.^n.i*,! ,r- 



>i*t i 



■•^••J«JS, 



three v.^icts. Typt should be 1,2,4 and 5 f>r 
low pass, band pass, high pass, and notch le- 
jcct filters respeaivelv. The cjioT frequency 
ranges from 0. .655J5 anc specifies the ftc- 
quetcy at and around — dcpeading upon the 
fdtcr type — A-hich the sound is lihc.cd 

Type in program 2, the hex cnterinj- and 
checking program and sjve it to tape .>r 
disc.'itc. Thet. run it and follow the instruc- 
tion > given in the program tc enter the 
iMujicodc 1.1 hex. dump. 

Whe:i yDu .lave finished entcri.ig -he hex. 
dump type Q to ge: out of the current scc^ 
tion iu the program then type in 2 to save 
the machine cods on d.sc Dr cassette. When 

all 13 nn;3hcd you should have a working 
;opy of the progiani stored. T<i load it hack 
into the computer at the beginniag of a sei- 
sion type: 

LOAD "name*, device 1 — this will de- 
pend upon whefter you u-;o dice or tape 
— £ or t — and what you ha^i'e named the 
program. 

3YG 00200 — th3 computsr will now rwbwl 
as i" you have just turned it on 
SYS 51680 — new until the computer s 
reset or ttrned ott Ihe new SYS com- 
mards will be active 

If yon find the hex dump too long or com- 
plicated to type in or you haven't the im; and 
Tou would still like a copy of lite program 
ihet. I can supply copies on cassette complete 
with a program that wil. transfer ihe prc^ram 
to disc if you >cnd a cheque or postal order Lo 
the valjc of £2.50 to ttie following address; 
Mr, Philip J. Ooward, 28 Tnicway Rd., Ev- 
ingion, Leicester LBS :UG. ■ 



Musicode 1.1 hexoump. 






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Colin Carruthers' easy 
conversion program 

THI'. IK iKaDUCTIOK ol lie Siiicliir /,X 
Microdrive s>ste;n olFcrs many us;rs fast 
access lo ptngLutmi and data. Programs which 
once took si-vcral minutes to load can no.v !x: 
available in a iratter oi' seconds. In faci, 
anyojie wh.i has ukcJ a Microdrive may be 
discouraged fiom using c£ss«ate-bascd sofl- 
vvnre 

However, there are very few ctnrmcrcirl 
programs availabj; fcr the Microdrivr due i.t 
I he ciTlticul.y in duplicaunj^ large numbers cf 
cirtcidgcs. I'ew software houses^ >een 
prep.^red to le.iiasc djiulls vt> how lo convcn 
I heir own proi,'ran)s for use on Aiicrocriv.- for 
fcar af escalaiing ihe piracy problem. 

Ihis IS a weak argument ^ince anyone win 
two cassette recorders and a blank tipe ca:t 
copy any program they wish. Several houses 
do release deuib, particuUrly ptbiishci.s cf 
serious softvi'are ^ucli as Ta.siiKm (Tjsvvord;, 
Campbell tAlasterlilc) jnd Hiso:i with its 
Sf rits o( compilers and Lssemblers. 

W'\)y should loading mate.ial iroin tape :inJ 
savir.g en Microd'ivc ca"i ridge presert a pre- 
blein? T)i ans'ver rh,u, we need o consider 
certaui aspects ol ihc operation cf a Micrc- 
drivt. Ifycj examine the diagrim in Chjpter 
21 ol'ih." xt^ttui^rd Spcccnm m.inval tho^vin^ 
Ram al!i>caiion, you will see that there arc two 
areas hbcllcc "Microdrive Maps" and 
"Channel Inrorniatioii". 

Wlienuver any Microdrive opersiion is 
invoked, ihise two areas prmv !>y ^0 .m(\ 505 
bytes rtspeciively. The Mip holds inform- 
ation atout the disiribuiior. of ilie 512 byt; 
long bktcks on the cartridge, whiit the Chan- 
nel con:ains j ^12 byiL* bullcr iloiig with 

d'.-tails such as file iiauiv and type - kc; 
Microdiiveand Iniertacc 1 manual, Appendix 
1 

In opcrai.on, consecutive blocks art p:tsscd 
via the bulla from i\u ciirt ridge tomeniory or 
vtci' ;v»'.'rt — dependip.g; on w.ifthcr wc or; 
loading or saving. Tl-c main poini is h^i ih: 
Basic pjogjani anj viri::blci n.ust be moved 
up by fi27 — ie, 32 + 5<»5 ~ bytes. To riak; 
matters worse, Irterfacc 1 appends 58 nev 
hviei to thi c->:isiiiig Syiticni VMriahl;a area. 
Thus, I he Basi:: program resides a! an address 
which is some 6b5 by:es higher up in uicr.ior/ 
when u*ing the Microdrive. 

So, why does this present us will: a pro- 
blem? Vcl , blocks jf :«achir.c code whic.i 
once loadeC inio ihe "rec spice jusi above ilw 
Basic area might now overwriie par of the 
Basic program or, worse stil . part of the 
Micjodtive Map or Chamiel. Kitiier way, ilie 
system is likely tc crash with the Microdrive 
runningj leaving js no option but to unph^ 
the Spectnmi and risk ccrrupting the .iiaterial 
stored on the cartridge. 

Programs can \y. divided ntc ihrei: 
cnc^orJ.;s. Those wh ch arc easy to converi lo 
Micmdrive — by the virtue of the addresses 
iLsed, those which can be loadcil irio a higher 
memory address and copied dow't> io :heir 
projier ■.aracl address before being executed, 
a.id :ho»c which need tc< be di.'idcd into two 
smaller bl.»cks and moved around after 
loading. 

The first category indudes programs wri- 




TAPE TO 
MICRODRIVE 



ten cniircly in Basic — sinply bieak into ihcn: 
ard save auto-star: on cartr.dgc - and pro- 
grams that .taw machine-code bUxks which 
Kiari 3t highaddru>:i:et:. Any block whic.n surt; 
above 2>000 would iiotmally fall into thi? 
category, but this iocs depend :>n the sizj of 
the Basic loader program. ?rtM;ra:n I gives 
los if useful information abou. materia! 
Ktnrcd on Mx'rv MKrh ;ii nuto Star: line r.unibei 
for Basic progrcms along A'ith length aud start 
address of machine-code blocks. 

Toust^ simply run it and playback t.ie lelc- 
vant tape at noimal loid volume ami tone set- 
lings. For each blo;k in the program you \vi:iti 
to couvc.'i, note di wn all the details or ditni: 
ilie screen onto a printer 

Typici:! output from program 1 might look 
I like: 



Name 

"yp? 
Stait 


: SupCfZGp 

: Basic 
: 10 


Length 


: 132 b/tGs 


Name 


: Screen 


ypo 
Stait 


: Bytes 
: 16384 


Length 


: 6912 bytes 


Name 

-ype 

Siail 


; Super2ap 
: Bytes 
: 32768 


Lenqth 


: 32768 



This is a fairly standard format, ie, Basic 
loider, title screen and main code biock. Type 
Niw nuC Mcigr ii. ih; Basic loadc*. It m ghl 
lo>k sorrcthing like this: 

1C C-EAR 32767 

2C LOAD " '■ CODE: LOAD " " CODE 

3C PRINT L'SR3500C 

It Ls probablv best to t'orget the title scrjcn. 
iliey aie designed mauily to keep people 
amuNcd wh Ie the mf,in code loads. Beskles, 
space on a cantidgc is lelyiively cxj-'Ctibive. 
Edit the program to make it loac the main 
code from Microdrive thus: 
10 tXEAR 32767 



20 LCAD ••'m" l:"Supor:apc" CCDE 
:iU HHIN I USH 3blU0 

Note that we lave had 10 charge llie name 

of the rode Work sinr* vn* «'4nrot hnvc two 

liles \*ith ilu! simc name on the :artrid;^c. 

Save this 3n Microdriv.' tc auto-ain from line 

lU. Now do: 

CLEAR 32767 : LOAD " " CODE 

in nar; in the m.iin codc froni iar>e. Save t.iis 

to cartridge by typing 4n, for example: 

SAVE • 'm":l;"Supc'zap.c" CODE 
32768,32760 

Reset the system hy tj'ping I'rir.t L'SRO and 
try loading in tie program liom M.crodri.c. 
Shoulti tliere be any problems, check caiefully 
that all addrcSSC) were typed in correctly. 

Vv'e need u> adii)ii a elilleiciti sLiaiegy Tor 
prcgritms with machi.ie-code blocks A'hich 
start b."low abou 2':000. F;>r example, imairinc 
a s'tuaior where the m.un block was 900 bytes 
sta.-ting at ackiress 2'10i)0. Clearly, tiis would 
overwrite the Micr:>dnvc Cliani.cl and DiNlc 
program if we were to load it in from Micro- 
drive to ttus iddress. 

The solution is tc load tlie codi- irio a high 
address and use j-rogram 2 tc generate a 
iiuiL'tiiiie-cuile luuiiiie lo tx)p\ it dovn to the 
correct plice in memor>'. Program 2 docs iiis 
by usi.ig :he powerful — :iitt to mciticn (sst 
— LDIR ins-riR-tie>n. To continue ihe above 
example, we would start by loading in the 
tin-e fiviiii tape lu — luj example — TOOOO. 
Run ?ro^ram 2 and enter the folbwing 
valjes: 

Bloc< Start : 3CO00 

Bloc< Lenclh : SCOO 

NewAddrcf^s • ?40flO 

Execute Address ; 24000 

The execute address can be fivund by exrm- 

iiii:ig th\. Ba.^ic liadcr for that piogiLui. 

Program 2 jilaccs ; 14 byte copy routine at 

"start ■*■ Isngth", 39000 in this case. Save t lis 

(continued o,i page 105} 



YOtJR COMPUTER. FEBRUARY 1985 103 



New -the official Spectrum Upgrade! 

Turn your Spectrum into 
a Spectrum + for just £30 



JtSft -Wb ^ 



SM". '^ JT* ^'' 

-- ;^- ■^^: .V " . " 






"S* ~" 









«a T " "^ 



• Professional full-size keyboard 
- includes 17 extra ke/s. 

• Responsive typewtrter-style action. 

• Accepts all current Spectrum 
software ard periphcak 

• Complete v/ith 80-page 
iUs3r Cuice and Conpanion 

Cassette. 



Here's sornc exr.it ng news for 48K 
Spcctrjm owner; ... the official 
Spertrjm Upgrade Kt. 

The £30 Kit has everything yDu 
need to turn your Speclrjrii into 
the stylish new Specl'un- t. You 
don't even need as* understanding 
of electronics, just the ablityto 
solder a few v/ires together! The 
lealletin the kit gives clear, slop by 
^lepiibliULliuii^. 

If you're not sure abojt doing it 
yourself, don'( worry. Sitrply return 
your 4bK bpcctrum to bi id^.ir and 
for £50 we'll Lpgrade it for y3u . 

Whicheve' you decide on. you'll 
also receive the new 30 :>ags User 
Guideand Ccmpanion Cas^elie. 

Tlie bi^er, jclter Spectrum 
keyboard 

Th; Spedrurr -*- measurss 12'// x 
6" It has a large t^'pewriter-syle 
keyboard, witfi hard, mculdsd keys. 

You'll f nd :he ixf^w kcyboiird fias 
a siTiooth, positive actior - idea for 
touch-typing, wo'd proc^ssiig. 
biinuldUun ptogtiiriis,arnJ exlertJed 
program rTiingsessions.Tv.'o'redfac- 
table legs give a perfect typing 
po^ilicn. 

There are 58 keys in all, includ- 
irtg 1 7 new keys. Profjrammers will 
be pleased to sec dedicated 
punctuation keys^ a sDaci' bar, and 
separate chift koyn for graph cf, and 
extended moJes. And a reset 
burton allovv^syou to dear a 
program from your comDutcr's 
memory without disconnccjngthe 
power supply 

The official Spectrum Upgrade 
Niiiurally /our upgraded computer 
will accept all the pciiph.'^r.^ls iii 
yojr Sinclair system -Interface 1 
Microdrivcs and so on, as wall as all 





Spedrum softviiar". '' 

Jusl as important, ncv/ Spedrum 
soflwa'e and peripherals will be 
designed v.'ith thcSpedr jm -;- in 
mind. So the Sinclair upgade adds 
slylsh ooks, new .'.apabilties... and 
new potential for the future. 
InUuded - Uie new Spectrum + 
User Guide and Companion 
Cassette 

The ritv<' User Cude 
ha* over 83 pages of 
iriformalic", rncludinj' 
a hancy BASIC dic- 
tionary The Campanion | 
Casscr.c p'ovidcsan 
intcradivetourotthe 
new kcyboarcard induces 
three entertaining arcade ganes. 

TO ORDER 8Y MAIL: 
When orderirg the Upgrade 
Service, send off your A8K 
Spedrum to the address t>elow, 
careful y wrapped together with 
the completed cojpcn aid appro- 
priate payment (PIcaso do fiot 
return She ma ns idaptot manual 
or other ancillaries.) Your upgraded 
conputer will be d^spatd-cd to you 
v^fithin 10 days of rcceivingyoi.rorder 

When ordering the Upgrade Kit 
siirply complete the coupxi. endrs- 
ingthc appropriate payment and 
post it to us at the address t>elow. 
Please allow u p to 28 days for deli'/ory 

BY PHONE: Accessor Bardaycard 
holde5 can call Camberley 0276) 
685311 fo' personal alteition. 9am 
to 5pm Moncay lo F'iday. Cnly 
the Upgrade Kits can be ordered by 
phone 

applici to working 4kK Spedtriim 
modeti in the UKony. 






ttHlpiB'^ 



»|i 



True VIC CO 



D?te«e 



Caps lock 



fxt ended 
ttx-dy 



Cdps^ill 
Scmitoton — ' 




B-eak 



Space bar 
Full slop 



tn/ert-id comma 



Iu5or controlb 



Comma 



I To: Sinclair Research LinileJ, Upgrade I)ept., Slanhope Road, Camberley, 
Surfiy,CU15 3PS. 

All p'ic« inciide VAt post arxi packing, tserOiiide and Oompanion Cassette. 

PleKCicrK: melhoSp«r.tnim 4-iIpgrad^ Kit I ftnHrKe paymv»nr nf #^0 
OR' 

□ Ptciisc Upgrade my 48KSpectrum for rrie. I oiclcse rny cumcuter logHther 
with paytn«r)t of £?0. 

I (»ndoso a cPr^nie "posEal order 

payable o Sinclair Research Limited br £ 



OR 



Pteaie charge my AccesuBardaycard no. 



SigiMlore, 



Nanre: Mr/A/JS/M5_ 
A\ddicss 



PLEASE PRINT 



VOC flC2 



Sinclai' Research Limited, 
Upj^rade Department, 
Stanhope Ro£d, Cambcrfey, 
Suirey,GLi53PS. 




(continued frojr page 103) 

li. caririJgc wi'h <>nmf'Thing liki* 

SAVE "'tn";1;"Fii€ Name" CODE 
30000,9014. 

Note that the liaigih has been cstcr.dcd hy 
M to save both the coie and the ctny rouiine. 
Giar.ge the Basic loader to loid in the 
nr.acMne-code rloni Microdrive, and the ex- 
ecute address ~ Print USR i".iin;in — lo ht ihe 
Stan of the topv luuiiut:. 5av; tl:is auiu-ru!! on 
j\ticri)dri\'c, reset the system and try it out. 

But what abttut machine-code blocks \v;>ich 
ate too large to re-locile usir.g tie above tech- 
nique? For example, say we had a bliKi: which 
was 41535 byich utig biuiiijj^ i'unu locaiion 
24()0J. This block iiLs I'm tncrnory from the 
tcp riRhi down lo add-cs;; 2430C, and docs no: 
leave space for any Microdrive opcraii«n>. 

What we need to dj hirre is .spli: the block 
ii.to iwt, Kad iht hi^h addresi pan into its 
proper locaiion, load ihc low address part into 
tVe display file and then use the ccpy rouiinc 
providcc by progrim 2 lo move the low block 
up to itJ correct address aftir all Miaodrive 
u|)eii.iio i» aie ovci. To continue thj above ex- 
ampli, first type; 



CLEAR 23999 : LOAD ' " CODE 
Copj' the bottom 1 000 bytes into the cisplay 

file using a short progran: such as: 

10 For x = 0TO 939 

20 POKE 1G38C. -t- x, PEEK (24000 + x) 

30 NEXTx 

and save this blcck to a teinpr>rary file c»i tape 
with 

SAVE "temp" CODE 16386.1300 
"Slow dc a Clear 2-1999 to make space for ihc 
Micrairive sv'stem and save the top fart to 
Microdrive cartridge with 
SAVE * 'm";1; 'High" CODE 25000,40535 
Reset tie system, k>ad in progrjm 2 and 
then the temp code fik: iron: tape b<iek into 
the display file. Start program 2 — ^y typing 
Go lo IC, rK)t Rut which would clear the 
display file — and enter the following values; 



Block Star! 
BiocK Lengtn 
New Address 
Execute Address 



16386 
1000 
2^000 
a^^QOO 



Save this to Microdrive using 
SAVE ''rn'MrLow' CODE 16386,10V 
noiing once again that the length must be ni- 
crcascd b\- 14 \o include the copy rciitiic. 



Finally, al er :he Basic loader so :har. it loads 
in "High' and "Low" from M.crodrive 
bctore doing a 

=>RINT USR 17366 

Save this on the same GJrtiidge, reset the 
systioi and take a deep breath before trying it 
out. 

Qic word of varnin:;. In all :ascs, think 
carefully where the stack ii — if [his is over- 
written by anything a system crash if certain. 
The position of the stack is controlled by the 
Clear statement so many ^rorilcms like this 
can be avoided. 

With the help of the ideas presented in this 
sriicle, it is pussible o convert most programs 
to kiad from Aiicrodrivc. The time spe.it 
waiiinj^ fot progranu to load bocomcs ncRligi 
ble vvhijh means :hat the bpectrui.i owner can 
spend more time playin:^ games and iess time 
silling :iround with nothing to do. 

It i)> probably a good idea to have a menu 
program on each cartrid((e calkd "run" which 
lists the piograms availahk. Program 3 givis 
LU example of the ore 1 use, and reducei pro- 
gram loading to three key presses — Ru:i, 
Enter and n whete i. is the sekctcd proj;ran. 



Program 1. 



1 REM *♦♦•*«♦#•♦••*■»♦< 

2 RSI * * 

3 REM « ProqraB 1 ♦ 

4 REM * • 

5 ncn • ll«*d*r • 

6 REM • • 

7 REM ♦ Colin C«rruth«r9 • 
e REM « • 
9 REM •*••*«•«»••*•♦«*•«♦♦•*• 

19 DATA SQ 

in TWTtK A2,a 

28 DATA 221,33,0,0 

23 DATA 17,17,B 

SB DATA 20S,B&,S 



35 
40 
4S 

35 
L8 1 

iM 
USR • 
T X 

7C 
POKE 

80 
READ 

90 
"Byti 

lie 



DATA 1,1, B 

rMTA 216 

DATA U 

IM«A ZUl 

BORDER 0: PAPER Bt INK 7: C 

PRINT 'Header V»r»ion 2.0" 

»«STD«C s F0« x-t®R "l- TO 

n--*^2x READ *i POKE x,at HEX 

rOKC USR -l"-*3,PEeK 236731 
USR "1" +6, PEEK 23676 
DIM t*(4,S)i FOR K-1 TO 4« 
t«(M)t NEXT K 

DATA "B««ic","D«t«","D«tli", 
^»" 
LET l-USft liSR "1" 



119 IF PEEK USR 'b'-e THEN 80 T 

lie 

U7 IF 1-e THEN PRINT i PRINT " 
laoa Loading Error' t 80 TO ISB 

12<l PRINT « PRINT "Maa* i"(i F 
OR K-U8R "•--1 TO USR "b"*-2l PRI 
NT i;nH# KtEK Kfi NEXT Ht PRINT I 

PRINT 'Typ» i"|t*<=>E£K USP "•" 
■H> 

123 LET b>USR "b" 

15B PRINT "Start i-(PEEK (b-^3)-»- 
2S6»PEEK <b-^6) 

14e PRINT "LanQttii "iPCEK <b-^3)-»- 
256«PEEf<: (b-*4)|" bytam" 

ISe POKE 23492,2331 POKE li£R "b 
x,8i SO TO lis 



Program 2. 








rvgth 




1 


RSM 




»♦♦» 


S0 


INPUT "NvM Acdress :";(!• 


2 


REM 


« 


a 


mt 




3 


REM 


♦ Program 2 


• 


69 


INPUT "Execute Addres«i";ax 


4 


REM 


ir 


» 


lee 


LET code-a-art+length 


5 


REM 


♦ - Block Cooy 


» 


lia 


LET x-0 


6 


REM 


» 


» 


12(9 


READ V 


7 


REM 


* Culiti CarruLtivrm 


» 


i:^a 


It V-V99 THEN STOP 


e 


REM 


* 


a 


138 


POKE code-t-k ,v 


9 


REM 


*»»*««*»«*'*«**♦«»»»•«♦» 


140 


LET x-x-H 


le 


Dcr 


TN 1 <k)-)«-236«INT < 


K/'23 


i3ta 


H\J lu r^fH 


6) 








200 


DATA 33,FN I (start) , FN h(st 


20 


DEF 


FN h<x>-INT (X/2S6) 




art) , 


,l,FN ;<lenqth>,FN h (length) 


3B 


IMPLIT "Dloc< Start i 


"jsL 


,17,h'N 1 (damt) ,FN h(de«t> ,237, 17 


•rt 








6, 195, FN 1 (ex) ,FN h(«x) 


4B 


INPUT -Block Length i 


'Jl» 


21B 


DATA 999 | 



Program 3 








60 PRINT "3 - Jet Set Willy" 
48B PRINT 


1 


KtM 


■»«'M-»#-»-K-»«*-|l' «"»*«■ ■»«-««*«#« 


490 PRINT CHR* <16);CHR* £6) ; "0 


2 


REM 


« 


* 


- Quit" 


3 


REM 


* Program 3 


* 


500 IF INKEY*="1" THEN CLS : PR 


4 


REM 


♦ 


* 


INT AT 10,9; "Fighter Pilof: LOA 


5 


REM 


* - Typical run File 


* 


D »"m";l; "Fighter. c "CODE 30000: 


6 


REM 


» 


* 


RAND0HI2E USR 63792 


7 


REM 


M Colin Carruthers 


♦ 


310 IF INKEY«="2" 1 HtM CLfcAR 30 


B 


REM 


* 


* 


000: PRINT AT 10, 10; *^Manic Miner 


9 


REM 


************************ 


"s LOAD ♦"ffl";l;»Manic.c"CODE i P 


10 


BORDER 0: PAPER 0: INK 7: 


C 


RINT USR 33792 


LS 








523 IF INKEY*="3" THEN CLEAR 30 


2(9 


PRINT CHR* (16>;CHR* (6)? 


"C 


000: LOAD *"m"jl;"Jetset.c"CODE 


C: Vol 07 22-Har-e4" 




: CLEAR 25000: PRINT USR 33792 


S0 


PRINT ■ PRINT 




980 IF INKEY*-"B" THEN GO TO 10 


40 


PRINT "1 - Fighter Pilof 




000 


50 


PRINT "2 - Manic Miner" 




990 P5n TO 5«0 ■ 



i 



YOUR CCMPJTER. FEBRUARY 1985 1(» 



The Complete 

Machine 
Code Tutor 

SKEC I KUM 18K ■ COMMODORE 64 • BBC MODa B ■ 32K ATARI 



/ 



^--i-^ 



Trust New GiiiiTaic^ ;o itrp tht myittry ,\wj; 
frcix Mwhir* Cote NJrtw i-y O/^mpor* M»fli<>* 
Code Tu;or makes it»niiij n.Kl irx.- <orfc rfirpc i© 
thei t's rxvf l>i.-i;n i bc.tcr time :c> dtKovtr iht rcitjr 
irwt benefits >( m;thin; cotc prs^runmirg lef 
whaithcpr«t«x». 



A coburfvl, clur. MKcnidvcconpiKC' 
tcichirj ptck)j< - the bcK IVt co^t acrott m »ry fit'i. 
Ji-VVattenof - 



Popular-Compuiing Weekly 



Thi p»i- of :i9M forms i wonfy jd'ji'.ior; to '.be I 
[riftgi, gMng Jihofoyjh expoj'l'*n ^rom the molt etmcKtr) 
evelof n-uhifc cos* ptogr.Trt-riw'g on U>c6BC f k'o. 



T>ie bee mtchirt code tico'' and nt terom 
Spe:trun projrantncr ihoi(:d l«rnm»choe cede withco; it 

Crash 



By f»r the 6eM iticrript come! (ron*. New Gtitcritofi 
Ssdwarc who hi; recently itu;«J iiiComp «; MKhlot Co<« Tuor tor 
:hfr BBC ."iiW tht; Spectrum. 

Popular Comouting Weekly 



New Geieraiioii have ;oc a vcr) met produce vcrc. it'i 
w»li ttuiigit oiii. easy to jiC, ie((hH<al^ plf3Stn£. and [m 
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. "Overall thca an txcok-m <lca. well cxcfJted 

Ccmputint Today 



Sipplkd wi;h full notct. this (j.vk.>g> lexhci machine (odeihe ^vay 

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AND GUARANTEED TO BE 
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ALL THESE PRICES INCLUDE VAT. 

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BOXES OF 10 DISKS 

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ADD £1 POST AND PACKING 

ALSO COMPUTER CASSETTES 
BOXES OF 10C 

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P.V.TUBES IF« 

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Tel: ;02'f5) 36521. (3254) 32611 
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Phont in Acc<$sJVisa •;afd no lor snme day (Jlapitlcli 



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nd 



SP'ECTeUM 

Z COMMaDORP 64 

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tha lirst liue 63(tw*f a linrflry to tfi scl up n (he 
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but novo' c^vatte^ ■ rii-iiiOi<, liu b/ful bvi vlh-'* 
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ofour DiscDunI C:tiib poiids sff psrlpferBh anc (op- 
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■ Wo Mm?l(i;.'ilfi:l rtthcf OS, fiocoTrmi'ment )3 
qujinti:y MNovitaats ariivln«airhe tfn<> ■Printed. 
VAiWnM rnaoLiine 'CoTipu'ercnai' f.i(;Miti norn 
Tfianany injrelvpecnowsloitjr ■ K*en€»!-ev«r 
laios ■ ACCESS holders an \t>n by tolophon«on 
0730 8«73? I NC RIVAL can o'fBr<il_lhl»^..._ __ 

To-. SOFTWARE LIBRARY .Tarnham Road, West Li^s, Hants GU3; 6JU. 
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SOUt PfRST TV^O 



r voj jcmi rnoM tmii leeuc 
(' t«nl t'ti' vo I3r irtwMtili 
D«^«C<tAltC :«Y.An« ffWA 




ADDFESS. 



Special oNfir fr<«m tMs 1<«ue: LIFE MsMSERSH P£5 

imrmely U.SOl. Cversftas Eurapa inly; £8, m 
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1C6 YOUR COMPUTER, FEBRUARY 19£5 




NZWSMCNGtR IS a menudiiven program for 
th:: ZX-81 )5K to show ;i Icxi in giani IcII.tn. 
The meni In^ niii.» nptimis: 

■ Character size 8 by £. 

■ Character si/re 16 by 16. 

■ Charactor $izc 16 by 24. 

■ User-defined giaphics, 

■ Fill character. 

■ Speed. 

■ Input text. 

■ Top line number. 
iiSa</e. 

The almost cntirclv Basic pragnm uses a 
m:ichinc-c»>du -ouiiiiL' licld iis liix- 0. Tht 
michitiL* code i^ only -76 Ijyicsi lun^. 'Hic cxi 
miy contain itnshificd cKjinctcrs, inv.Tst — 
shifted — function — and graphics. 

The funciion c'.iaractcrs plus tic shiitcd 
charujlcr H rL■p^c^^;nl th; towe;' ctsc charac- 
ic:s. Tht Kh.fictJ cli<4i<ctaii A, S> I>, F, G. W, 
E. R, T, Y, 2, 3 ind 4 ire rcstrvcd for user 
dtliiwd graphics — UDGs. You can define 
c^.y liii: :haracti:r "!" and its inve.sc, which 
do noi telong to :hc standitrd chiiraccr set. 
V('licii you con't like the lowcj cosc cl)ara:tci 



set, you are also able u- alicr 'his. 

In uual you Lave 26 ■♦ IJ UDG's. You 
-'an'r alter the "shifted" charjctcr Q hecuiise 
ihij citararicr is used in stririg iipu. %'hjn 
you are not fan-iliar with UDG's, read the 
article ttJ Your CotnfmU-r hpt'A i9S4. 

The data ol' the jtandard ZX-81 ;h3racier 
set bcfin :n thi: Rom at addroSK SlHtM) {7640 
dec.) and end at address SIFFP (8191 de:.) 
On.y the data of the chiractcr; with code 0-53 
are in ihc Rixn. 

The da:a of the UDGs be<;in at address 
I6'6Ujii stortr. with the data of t.ic "sh.ftcd" 
cliaracier Q — code 192. Then the d«a 3f the 
"funciion" chaiaclcrs with code !9V21'5, 
followtd by the "shifted" cha'acters with 
code 216-221'. The dtta of ll.e "function" 
charuc'.ero M, H and T with code ^1 <<C cr« 
pla;cd afur the "shifted" characier>. 

Vou have tht option to alter ihs fill 
character if t.ic giart letter, the speed and the 
top liix: nun)t)cr. 'llic fill character cai. he a 
"uuihiftcd" chjr.Ktcr. ;t invcmc — or .i 




p|^^^^^^>s^.^^ 



graphic, .'\ddress 166S>0 holds ihc cocc. 
3EEK{t675l).2-1 

j;ives you the speed on a scale (Ny; is fasl, 9 
issU'W. 5 is the most "r;adjble" ^p«d. The 
cop line nvimber can vaiy for option I froni 
M7. fo: option 2 from 1-9 and for option 3 
the lop line nuint.<ei will be 1. Tl.c |.i«jkiuiii 
chec<s f;ir invalid values. 

There are difleivnt ways to save text. First 
you •::in run the proj;rain ard ctatcr your text 
in optio.i 7: 

■•T=XT"N/LZ3 
hold; your text. ■<etarntng to op:ion 7 and 
tvpinir rcw text the o.d text is rjbhed out. To 
prev.-m the loss o.'the old string variable ZS, 
y.">u have to break out during input mod; by 
(conttnoed 7n nis!>t page) 



Hcxdumo, 

16514: 
16522: 
1»=^S30 : 
1653S: 
1654.5: 
15554-: 
16E52: 
16570: 
1657o: 
165S6 : 
15594- : 
16602: 
15610: 
156 IS: 
15626: 
1563i' 
15642: 
15650: 
15658 : 
15666 : 
15674- : 
156S2 : 
15690 : 
iSe.QS : 
15706 : 
16714-: 

15730 : 
1673S ■ 
16745: 
16754: 
ie7F,2 • 
16773 ; 
16775: 



IF: 

16 






0000000000000300 
3F3D21Sfl40221540 
CD1C11234E2 34523 
C5E5CDBBC22CE1C1 
C035E57EFE4O230fl 
FE412606FE422302 
lS0306Fi6c:0322140 
C:BBF060315eO5F21 
O0001910FD3fl2140 
FEC05305il733F13 
O311O01E19CC-En40 
E123CieD20Bfl73FE 
002Sfi7e50E0013B0 
E5iaa^4.tU> 50 10300 
EDB03H2140CB7F2S 
0Fr:F;77i=00RI 13240 

0603 lfl2F 1213 10Ffl 
OE0S0606r:506012fl 
eC4011££e*0ED5211 

210019i0FfiCi227B 
40112100i9DllflCB 
7F171213D523033E 
S07713EDDiC50601 
C52n34-40OB45C:OFO 
CD5641CD6D41Cil0 
£FC10::'11S240D520 
byL>_tlCy2H7B40H3 
233E03S45D23011F 
00EDB0?B7P:3;-^P33D 
CS1SF021H00C2B7C 
B520FBC:905©50024 

£40000000 ceoooao 

3E4040403E0000G0 

7C424S 7340400505 
05050505050 50003 
300 S 03 0336000004 






16302: 


431 


16310: 


503 


16S13: 


1232 


16325: 


1112 


16354: 


■^57 


16Si2: 


474 


15350: 


553 


16353: 


449 


16366: 


7 31 


16374: 


57S 


iSSSS: 


1053 


16390: 


426 


16S98: 


662 


16905: 


933 


15914: 


59 J 


16922: 


390 


16930: 


232 


16938: 


45:3 


1594.6 ■ 


674 


16954: 


577 


16962: 


S05 


16970: 


913 


16973 : 


OOS 


iSOS^S ; 


944 




901 


17002: 


1034 


1,--010: 


34,9 


17013: 


«9Q 


170PS- 


336 


17034: 


711 


17042: 


36 


17050. 


316 


17053: 


513 


17065: 


33 


170^4: 


36 


17032: 



0004043404330020 
24332^2222000000 

3E424.2 3E02e2ei00O 
49494 94936000000 
3C427C403CG0000O 
3C0S3E423Ee0000O 
3C403C023C 000002 
023E42423E00000O 
3E040S103Ee0000O 
2214031422000000 
3ES0202023e:0e04O 
407C42424200000E 
1073101010000000 
3E42423E023CS00O 
3C 42424233000020 
20202020 i::S0S009 
2222120004136000 
2222222215000000 
:3C2£2££££=:00e00O 
ciH22;£2 1-03003000 

00000000030000EO 

E000000O0300F0FO 
F07E7E7E7E0005e5 

©505050505050000 

6000000000E0000O 

1. f b0 1:.0^ 050 5 0505 
0505050505050010 
TP^-liTsl e^iTsi^ 10003505 
0505050505050024 
00242^2-04333505 
O3G5050505050 505 
0505050505053010 
7^1010100E003e40 
437C42427C003000 
7649494949003505 



= 104. 
= 196 
= 260 
= 346 
= 374 
= Hbh: 
= 243 
= 253 
= 152 
= 116 
= 254 
= 400 
= ISS 
= 313 
= 350 
= 156 
= 126 
= 156 
= 196 
= 25;= 
= 224 
= 734 
= 754 
= 43 
= 33 

= 40 
= 46 
= 74 

= 66 

-* J- r '_f 

= 40 

= 46 

= 250 

= 444 

= 420 



YOUR COMPUTER. FE8RUARY 1965 107 



'continued ftom previous page) 

nibbing out ihc firsi quoii: ind rhen press 

■'shiftisi" A \'/L. 'riien ycu tvpe: 

LETAS = 2$WL 
jnd the oli ttxt is saved in the variables art a. 
You rctur.i to the Dii^U {Jio^jiiin Ly iy(iiny. 

GOTOON/L 
Do noi use the command Run because this 
:onamtnd will also clear :he variatles area, 
and Chat is wiiat you don't wiiru! 

SiJt-iiiiJ. y(m (.ail bicuk uui duiiiit; input 
mode 10 enter different suing variables You 
:an us; the string variibles A$-XS and sub- 
scripted string variable!, wjh no iiniitutiotu. 

You can rub out the quotes 

Do not use YS and ZS btcausc ^he program 
•jses ihcsc string vaiiables. Ycu can ivp; eg.; 
_ET A$:^ TEXT' NIL, LE" BS = "Te'XT" " 
^J;L, D M .\$(lO,-0) NJ/L. LET A${J) «"TEXT" 
N/> 

You return to :hc menu by typing: 
-GOTOON.L 

When yju return to option 7, you ca.i rub 
out the quotcc nnd type eg.: 
AS4-B$N'L 
stringN which you have entered before. Z$ 
nolds ^en 

A$ + BS 
Vou can a'.no lypc: Tcxi, jump over ihc quote 
:tntl lypc: 



+ AS UfL 
7. ho'ds the.T 

"TEXT" 4- A$ 

When you w-jnt K> save on tape the st'ing 
vLri'jhluj or your "JDGs. option 9 gives vol 
the opponunir/. After typing; 3 N/L du.inj, 
menu mxie, the p;og.'air. wtiis for pressing i 
key. U givci you ihc tin:c to set up the tape 
ra:order. 

When you want to break out tlie machine 
code routine duijiig optlmt 1-1, juM t>ic>.> < 
key a while. It is acvisjble njt to use the 
"break" key because :hcn you also break out 
the Easic proKtam 'I'len it is a Ivabii to type 
Run M/1., hm (hen vo;i will clear the variablcj 



Hexloade:. \ 


oo 


p£;i «e>. -OihDEp. 


iOO 


«>=!iirr "synr.-^ nDcr£e=- 


110 


:wP'v~ f 


1£C. 


ts.:uT fin;?.-' fi:rRE5S- 


i3C 


:n?lt f 


' * .T 


FOB Nr.s T<> r 5TFP » 


Z '^Q 


-ET T=© 


ii^ 


»<?INT rj." - •■ 


ITC 


:n=l>t <as 


iSC 


Psii,iT i^s; ■■ = • 


IW 


iNwoi rui 


cCC 


PRIt~ TOT 


tie- 


LE~ Z'C 


<=^e 


FCk K»i TC lE'. A» r-fS' E 


&S& 


^c-r c. <c3&e fi» (»■.) -ae.»--i5fcc 


Pf ftStK+i.-^'? 1 


540 


LET TiT*~ 


asc- 


I^C\E iitZyC 


-sc- 


LE- Z^Z*i 


£70 


!JE>,T r 


^sc 


IF TCT-T THEN 50 TT JiC 


£sa 


i>RiNT ■e^ROR - ple:»s= r^;:^*.- 


A(mZU- • 1 


3M 


SC TO :5.■^ 


:-ic 


,)B-V- ■ 



aiC'j. Use al\vay:> llic uuui:iiund Ooio 0, and 
you will gel the menu again with the vaiiables 
still present. 

Before you can enter the machiiie cod.', j'ou 
have to make a line with a Rem containing at 
Icdsi 576 Dytcs. To :reaie :his Rem first enter 
line 1 with a Rent containing 91 dO'S. Check 
the nmnlxir with 

PEEKn6511) + PEEK(16512) X256 
The number must be V3: 

REM + 31 dOts + N/L 
Thin jsing t!ie Rdit alter the line njiUDer so 
that you become 6 lines with 91 dcts. Then 
type: 

POKE 16514 1 18 N.L 
POKE 16515 118 N.L 
POKE 16510 N/L 
POKE 16511 68 N/L 

anc you have cre;:tcd line with 3 Rem 
containing 567 bytes. 

PEeK( 16514 + 576) 
must fce 118, check :his! 'llier. etuer the Basic 
program hexoad. 'Ihe startaddrcss is 165' 4, 
the endacdress 17039. Save he proi^nm on 
lap;: alter etuering the hexadecimal nunbers. 
Tlii;ii culci: 

LET Z$= -TEXT" N/L, LET L = USR 13524 

NfL 

anc the program should run. Pressirg a key a 

while .vill bring you btck to Basic. When the 

program doesn't work, c.icck tl\c jddtes&vs 

10514 17089. ■ 



3asic program. 

» PEM *<Ct PPPNS Z3JH * 

J REM k NEw?nON3Ef: ^ 

i REM «.**»«-«-»i?*«#-*#*«**** 

«.T SI.OU 

33 PFIHT • MClJU", . , , 

43 PPH»T 'BCIIi^«ftrTCR j1:S i^^ 



53 PPIMT 

:e". , , 

63 PPTNT 

73 PRINT "H UcCR :£Fa:j£D 3P.*rh 



CHfipsziTEi; ii: 



S3 itfilttT 

»t' Kf i.ri I 

1C3 FPItIT 

113 PPINT 



FILL rMftVfiCTES- 

I<nFUT .TCX-" , , 
■^OF LIME 'iUMBIP 



123 rriMT •« SR'.'C" 

133 PRINT AT kL Q.WiV^^S^BM 

143 DIM YS(1» 

ISr INPUT V'4 . ^_,. . 

i&3 IF Vff-J" 0%Y%>"^ Tr|2K GC 

70^150 

iS3 If'vj.'O' then GCTO *03C 

19? SCwUC '.'Ai. . irisec 

20^ CLS 

21? GC"^0 20 

:003 POKE 16697 .1 

•!^\f, POhF 166 "6,33 

'.'323 PQYt i&732,J 

1033 LET L.Ue>0 3 6Sat 

:34:> PCTURM 

looj FCKE leesr.; 

ijli> PCr.t iP& ?.ee 

£02? IF PEEr. 13.eES>? THE'I P3KE 1 

eesj s 

£^33 PC+e l^TJi" 15 
so^^s LE'" L-u;r issii. 
I2S3 RE'^JRH 

C-013 POKE ll>t.T6,>Sa 

w05? POr £ 166?5 , 1 

:;<CV3? PC '■ £ 15732, £1 

"043 LET L=USe 16=21 

ieSJ PE-iJPN 

i-CJlJ PPINT 'YCJ CAM tEFIrlE I'OU^ 

OUrj iSPAFnIC. ' 

^013 ePIriT ■rc:^ ur-3 flPE THE ••■5H 

r-^rc , 

iLS^a pp:nt 'cws^pfctirs m 5- ^.- c- 

vi . ? P , ~ V ' , , 

iOSa PRIMT '£.3 AND * fi'.'flIfi5L£. . 
UU :'#»N (3LS0 ' , J 

CC4.3 PRiriT 'flLTER TiE LO'IEP C>^SE 
CH^BmlTHRS. '■ 

IJ!:CT-OtO'- CHfi--' . . 

-253 PRIMT PfiiTEPS PLUJ •■•■5h2,=T 

•373 FPTNT •Eti--T- iTTINC uT^i. .-^E 

T'JSJ i'C"^' TO 

iC^.^.T PP--IT '"^-5 r;'j '. _, 

1^3' p ri-;T .^~ "_\_: i*nrf iiM~Tvrfii 



-taso irjPUT 

CICC IF VI 
ilij I? Y» 
» Yfa-PtlD* 
iISC I" Vi 
AicS Cu* 
4 370 LET 5 
J.1CO I'' • * 
P vi» SNC- 
41S0 LET I 

X2C2 »«INT 

jOi.aep.Ti-E 
4210 F^iir 
Smlc Hi OC'" 

:££C FRi:.- 
inFur 3 ftT 

IHE •..•:_L • 

Ai.;S ?kIkt 
E L IHE . ■• , 
4.250 roR J 
4£cO PftlH"' 

42-0 :;5XT 

AicO =»IliT 

4S«o 'OP : 

43C0 rfHiiT 
4..ilO i-Er T 
4^20 "OR J 

4S30 ZNiPuT 



• rriUN RETURH 

T«EK GOTO A16C 

■ AT TMEN SOTO 4100 



riiVCf ■ o» vaB'Pi o 

MCt-: LET $3166 *& 
JriEiSi-COJ'E ^»*3 
£NC\iT P fOR « 5LAC« 

■SHCT/ 5TRIM6 FOR ft S 

■JiU- HftR»> TM5 PLftCE. 

'■'HZ 8EGIHNING OF ft L 

■i*L*;E « SPflCE* XM Tii 

I TO O 

-^e r; : 



= C TC 7 

Xt-i 

■0 

=7 7C e iTEP -: 

Vi 

T «»ri: rs.s-e Tact. rUn 



4j3o ; 

i?e3 : 
4;*70 I 

4.300 I 

4390 : 

OOTC 

AJOO - 
0.410 fi 

4420 = 
ij:0 ' 

4.4iO •. 

44S0 =^ 
«(?00 = 

NT LE- 
5010 = 

.'CUR : 

5020 - 
SA.CTcP 
5020 ' 
;. i«OT 
SG40 
5i»50 P 



V»7 4NC Y!i"0 THEN 3C~0 



' Vr-' 
V«-' 

VJ = 

\%< 

Kli;: 
gy"^ . * 

riP.t' 

£xT 1 
=Tl.i»N 

^lUJ • 
TEP- . 

i*IK~ 

^Oli-E, 
Slur 

■* C^" 

I!iT 

SII^T 
RlhT ; 



k. 



THEN LET -»T*2kiJ 

THCS LET .'S = "t" 

TMEH LET .*= , 

»:»):• Y s ' ■ ■ . ■■ THETJ 



6053 cm YSd! 

6Q6Z! JNPiJT Yf 

607? IF V4-" •• TKBM QBTUfthJ 

e083 IF v«<"0' uB Yf>"«" THEt; 50 

50S3 POKE i57Si,LyflL Yii-l»*-2 
6103 PE-fORN 
•UV3J FLTt 134. is,*; 

*013 RRIWT "VvJ. CAN Et^TER .OUS T 
tXT.ZJ !*■•,, ,_^ 

T0£3 PRIMT "USED TO 3T0»£ THE IN 
r'jT.vcu cnn" , , , 
TS35 FRIfrr '-rfiPLT CHRRRC'ERs . IMM 

7C4^ PRZMf'"GPf=(PlilC5 - ,"" SHIFTED 
" • - FN&- . . . 

7033 PRIMT rUNCTIOr--" -.THE " 

-F'JNCTIOrl ,, 

7053 FRUIT •■C^ARftCTERS PfPRSSCMT 

TH; LOUER' , , 
TOTS eRUrr 'CflSE CMflR|SCT£R*.t>'JE 
PT13U THE" ... 

70S3 SRIMT nHtFTer-" ^E'j H RE 

PREsCtr LOUER' . , . 

?t\a;t =OTllT "r.CSF m.THS '"SHirTEC- 

7103 SRinf •'•£>>!<;, J, E.R,-.Y, 2,, 3 

ANC- 4. i^PE" . . 

7113 PRINT -USED FOR '.DG.SEE OPT 

?ig3 ''=^rt.f '^i^tfr-WrfifiBrf-wnTiri 



rHE^ UOTC 71J0 
•,-lE P 



"OL' CfiM FILL THE SIR 

;'I~" ft ChMRfiCTES :- 

"HS P?E5E-iT ""IL- :-« 

~n£ cH=T STRING ' Tl- 

~h£ CHwR wcrep, 
r £i,e 



-11^ DI-! 



<^a^C\ - TH •«» I t » 

5G30 IF V$=" ■ TMEn RETURM 
56*0 Ir T»> 2' i:>ND Yt-"B- OF YS. 
•g T^-SN 0Q~0 5076 
siju r-uNK j.BabU,(;o£-£ -s 

5110 PETUPN 

6000 =RI:1T -*'0U Cfin ftLTER TH£ f» 

EEC. THE" ., 

CfiLE 0-9 ■ ,FEE^ lfe75l 2-1; " . ' 

5S20 PRINT, "HE EHPT-f- STRING wl- 
L nor i^-fP- , 

50r-O ~~i:.~ ~r^^ ;.mnB Fo , " 

SQ^ — ■ 



7133 JF :NKev»= 
7143 :ls 

7153 SOKE 13415 .2 
7163 cPItJT ^T £1 .e 

7173 :mplt i$ 

7133 PETURN 

3003 PRIHT "YCL' CRN C)-00iE 

Li^CE CF "HE" . , . 

5013 PRINT "TE>.T- ON T^-E JCREEti . 

.-OR OFTICM " , ,. 

it^&O BSIliT 1 TiS TOP I.IIIC C'l'i 'J 

rtRY 1-17. ■• . ; , 

5G33 FRItiT "FCR OPTIQt-; Z THE TOP 

Ul'^e CAlJ ■ , , . 
30'.3 CPINT ''OeRV 1-9. FOP OPTIOt- 
i THE TOP ■., , 

3053 Pftlur "LINE Uli-L SE i.TrlE " 
P.E2ErtT TCP", . 

3063 CPIU'^ ":.INE NL«SEP : , PEEh :. 
SeSi,' .TtrE EMFT -STRINS" . , 

at>7J j;SII.T JJ, KCT F-TE» 'IE ••' 

jnBfP." 

i033 ~;^Il.T H- 21,0. flS!I:VCak#<!>32ii 



30SD cxn .'S-.2} 

3103 2IIPIT ,S 

1-113 1= "$=■■ 

?i£0 :■=■ '-■•^L '1 . 

£N jot:! ciOO 

3i;?3 PDKE leeff 

?143 PETLis^fl 

50C^ "TT;."" >"~ .1. 



3022 IF rtlKEvjs 

>e-?? GOTO 3 



OF yS_ ■ S > i ■ 
••flL Y? 

{["■uriTITm 

THEtt GD-0 3G23 



108 rOLn COMPU"EB. FFSRUARY 1985 




ROTRONICS WAFADRIVE 
FOR 48K SPECTRUM/ 
SPECTRUM- 

Dial 128K storage. Fast 
access. Centronics and RS232 
irterfaces. And now FOLR free 
wafers from SMT.includlngthc 
Saectral Writer word 
p'ocessine package. We're low 
irckiding a free 16K, 64K and 
128K wafer with eacl- 
Wafadrli/e. M\ ihis makes the 
p-ice of £129.95 (inc. p&p) 
ftvpn moro :»ttran:iv/p 




Tlie Rotronics Wafadrive has 
nowprcved itself as the storage 
system tha: offers more. More 
features, nore reliability and 
more speed, lis rricro 
Interface, two 128K drives. 
RS232 end Ceitronics ports 
arr> all cnniaivad within nne 
attractii/eiystyled, compact 
unit Wafadrive achieves very 
fast oadingandsavjigbutnot 
at the expense of reliability, 
which i« on a par .vith flappy 
disk. 

The fully interciargeable 
wafers arc available n three 
sizes - 16K, 6^K and 128K. _ow 
capacity wafers are most 




s litAhk fo' proBfam develop- 
men: as they offer fa;ter 
access. Hi|h capacit/ is most 
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Lsading rate i$ well over ten 
timos at fast as cassette! 



Software eq eclion is ever 
growing - see list below for 
details. f< full colour brochure 
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ninute softwa'e and accessory 
information rsovailable. 



iBok Id SMT for the ftest deal 
DnallBptrpnics peri pherals 



ROTRONICS DX-85 
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High quality and high spesd. 
The DX-85 prints bi-diroctionaliy 
a1 100 ops, logic-seeking. 
It offers a 96 character set at 
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column width up to 132 
characters. Programmable 
typelaces including extended 
and itali::. Centronics interface 
standard ard free dust cover 
supplied. Options include 
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roll holder, RS232 serial 
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See our special pri:o »i/hen 
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(procf of purchase required). 




ROTRONICS 

PORTABLE CASE 

Tailored foam insert holds 
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All components remain fuliy 
opeiationdl iii^ilu. 




Sizel38mmx 700mn" x363mm, 
ONLY £34.43 (p&p £2.50). 




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1 = 



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«c3;-ce»« -ti. cf.1 oe-ior 

CM»vtt;i>t*t 
«ii.i.n»,iMifW rtivt: 



a ilMMcKk . 
^£K»Mk. 



1^ 13 MilHk . 

i»UUmk . 



«r»«M(i> . 



■a «*'><,»** 

■OIH I. 



3 1 endose a cfieque.-'PO* made payable b SMT 
U Debi my Ac:e£S.'B3rclc-ycard' account no 

Si^Tatiie 



YC.'Z'iJS 



IVIi.'K'ti- i."j iioslicaUc) I 



Name 



Address . 



E! 



Scivdlo:SMr.FR£EPOST 
Grtt«nt NorOn, TowceEttr. 

Nor-hants. rf4128BR 

(mLffplf.ptr-.i 

VIC :'J a^^CBit &lsfpfi»g.«v»rl ■irlfnMrk, iji Con ■ ciloi.- l)y>wn.'Vj V-jchnifS 



SMTI 

_l 



c 



Mirage 

SOFTWARE & 
DISTRIBUTION 



1 Sandy Road 

Top Floor 

Sea'orlh 

Liverpool 

L21 3TN 

Tel: 051-928 3443/4 



PROGRAMMERS 



WE ARE LOOKING FOR TOP QUALITY PROGRAMMES TO MARKET IN THE* 
UK AND ABROAD. THE PROGRAMMES MUST BE OF TOP QUALITY AND IN 
MACHINE CODE WITH GOOD GRAPHICS AND SOUNDS AND ORIGINAL 
CONCEPT. WE ARE LOOKING FOR PROGRAMMERS TO CARRY OUT WORK 
ON NEW MACHINES SUCH AS THE C.B.M/16 AMSTRAD AND M.S.X. 
WE CAN SUPPLY THESE MACHINES TO CARRY OUT WORK FOR 
MIRAGE WE ARE ALSO OFFERING £500 PRIZE FOR THE BEST PROGRAMME 
RECEIVED BY THE END OF FEBRUARY 1985 WHICH WE WILL DECIDE TO 
MARKET. WE OFFER AN OUT RIGHT PAYMENT OR 10% PLUS PAYMENT OR 
20% ROYALTIES. FOR MORE INFORMATION CONTACT THE SOFTWARE 
MANAGER HE WILL BE GLAD TO LISTEN TO ANY QUESTIONS YOU MAY 
HAVE. JBam!i»s»k(>i^eigfif^i$i;^ 

SOFTWARE HOUSES \ 

WE ARE LOOKING FOR TOP SELLING PROGRAMMES TO DISTRIBUTE TO 
OUR WIDE RANGE OF OUTLETS THROUGHOUT THE UK AND GIVE YOU A 
VERY FAST SERVICE TO HELP WITH YOUR SALES AND TO MAKE THE 
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WITH RATES AND TERMS FOR A FAST ASSESMENT. FOR MORE 
INFORMATION CONTACT THE SALES MANAGER HE WILL BE GLAD TO HELP 
AND ASSIST YOU. [= 



U. ■ ■■■■ . I/. ' •■■ - ■■tlf^- I ..•-■^.li 



DEALERS AND DISTRIBUTERS 






DEALERS WE HAVE THE BEST SELLERS FROM THE BEST PRODUCERS; 

WE ALSO OFFER VERY GOOD RATES AND TERMS TO HELP YOU AND US 

TO ACHIEVE THE BEST SALES AND SERVICE FOR MORE INFORMATION 

CONTACT THE SALES MANAGER. 

DISTRIBUTERS HAVE YOU GOT THE MIRAGE RANGE ON YOUR 

SHELVES, IF NOT THEN CONTACT THE SALES OFFICE FOR SAMPLES AND 

RATES. 



v^ 



SALES MANAGER 

T.C. 5APH1ER 



SOFTWARE MANAGER 
C.A. SAPHIER 



NOTE: We have moved to new premises 



110 YOUR COMPUTER, FEBRUARY 19E5 



BA Naylor and DW Boycs 
and a BBC database. 



SUPERFiLE IS a vi^rsitilc database written fcr 
tne BBC Micro 32 K nodel. This may be used 
Ibr various applicLlions ninging from the small 
home-based business to the faniily's video 

caeKttie library. The quct^cion is often csUed 
v/hat a dalabas: actually is. 'n sliort, it miy he 
desc^ibid as a conpulcrisctl fiUnf; :ab net that 
alIov;s rapid data collection ind reirieval. 

Data is stored on cassette in tlie fcrmof'a lik\ 
lath file bciii^ split up into TKCurdK, each of 
nese records beinij ft rtlier divided into irdivi- 
dua! items of diia railed fields. 1' is advisable to 
become acquai ited with ihese terms as they aie 
vsed many times in this article. 

Svipcrfilc h;ir. a cipndtv ofup to 10 fields each 
v/ith up 10 25 characters, allowing 65 records 
with this cttnfiijurationj or ta'O fields with 325 
rucoids, these being the two extremes of the 
systtm. 1 1 is obvious thcrjfoie, that the numbt-r 
cf records k calculated by divicinf- 65^ by the 
rumber of fields entered 

Incorporated in the system iy a mtqiic Sort 




SUPERHLE 



which can tapidly arrange xcccrds in order 
' alphabeticallv or numerically, with the user 

chooc.ng the field to be sorted. Another grunt 
asset 10 the system .s tlie niulli fund on Search 
pr:)ced!irc. This allows thq full use of eqjalttics 



lo seek a particular i:em in the file. 

'llie whole system ha^ been vciy efTicenily 

dc;(it!:ncd »)t»d prtigfiniined fo aid the user and 

process the data as quickly as possible. On 

^contirued on page 1 17) 



MKREM SUPt:FfFri,t (>jt,-b«r.«? 
ZQREM l)y B ft Navlor and 

7eM0DE7 

6BSE=0i ST-ia»r«»l t rati'St he»i-i 

SB»0PT5,5 

110PR0Citi:PR0Cm 

r/aDEFP^OCiri:RR!NTTAB(0,0);ChR«332!CtiR«157:Cm*131:C 
HR*141:" SUPER F ILE' ; CHR»132; " Data Babb. ": 'RINT-A 
B<0,l);CH"<»i32;CHR«lS7;CHR*1.^0jCHR*141;" RilPEt FILE 
";CHR«-.295" D*t.i ba»•.•■ 
B (t N«ylDr &< D W M Boyci». " : FRINTTAB<B,23) ; CH^«132: C 
W*157fCHR*liBtCHftSl4l;" B c* Naylor «. D W M Bovce. " 

UBPROCh("S»t_Up"» 

lbBPkINTCHR*l31t "Th* no. o* Fields s "jPROCi <2»,3,2," 
I"):F»>VAL(*1> 

16BPRINT:IF F>i2 tFF< 2 THEMPI>QCf»:P«*lNTCHR*129: "Fia'.d 
s (2 to 13). Try acjai n. ": lN=SET:GOT014e 

I /BR-INT (6Sa;F) 

laiflk'KiNHjnK*:^; "The max no. of R»:oros :";K 

19B PRlr>lTCHRtl3li"Ar«' yau hdfpy with thi« (V/N> ?"; I 
r>»i=GETJi IF IN*'"N" THEN 140 

20BDiMrt«^(F,n; ,Ei*(r> .rto(r> ,icbc]«(=^> ,item»(F),ai.(F« , 
hWTCHCR) ,tot (r: :f»=""iFOR I"/.= l TO F: 311 ( IX) -"S":no(l'<> 
=25:labBl*(I7.)=".. . "tNEXTiFGR I'/.-: T!) F s MATCH < IX) "OiMF 
XljENDPRtX; 

2ieDEFPR0Cm:PR0rh("Menu">iPRINTcm^*13e;SP;(Q>| ' (It 
Filename.-jPRI-^TCHRJlSajSPCie) :" (2) Defirve Field 

•i. ■■:PR[NTCHR«15a;SPC<«l ( "(.■^> l.oad Fi 1 *•. " i ^RtNTCHRtl 

3ia;SPC(8); " 14) Save Fi I e. ": PRIMTCHRllSB; SPC (8) ; " (S) 

Edit Fi le. • 

2:'0PRINTCHRS13H;SFC<8) !"<6) Sort .•; PftlNTChf** 130; S 

PC<S)5"<7> 3«rar «.li. *iPRINTCHK*130jSPC(B; I -tS) Di a 

play File. "■.PRINTCHfi*13a;3PC(Q);"(7) Printer Dump." 

•.PRINTCHfti:i3aiSPC(8){ ";«) Start Again. • :R=PEATi IN*= 

GfJTttUMI Il_ lN-«:v="(a" AND IM*<;="9" 

230IF1N1.'-' l"THENPPOC-f E-SEIFlN*-"2"THENPR0:df ELSEIF 
IN«="3''THENPRnCl<.l tLBt >IM**"4"THENPROCsa EL3E1FIN«="S 
"tHENPROCed ELSEIF IN*= '6" THENPROCso ELSEIF INt^'VlHENP 
fiOCse ELGEiriNt="8"THEr4PR3Cdi ELGEirim-"9"T-(EM>R0Cp E 
LSE:FIN*="a"THENPROCst 

24BPROC(n 

25aDE^rr-R0Cf ;PROCti("F-. le->ame"):PRIhn'CHR*:31;SPC<5);"F 
ilename <"; ^*;TABt2£,3; ; ">": IF **="" THEN 262 ELSE 290 

2ft0PROi;i (!6,3,ia,"S":' 

27Br*-=* 

2a0P^IKTTAB<0,6) ;CHR*151; "Do you wish to cnange ttie 
filnaoi? (Y/N> ":IN*=GETS: IF IN*="Y' THEM 2aQ ELSE END=R 

on 

290D=FFROCh(h*):CLS:PRINTTAB:i6-(LEN<h*>/2) ,e);CHRI:l 
29;CHRH41;h*:PRINTTADU6 (LEN;h*i/2> . 1 ) iCMF^^l^^iCMRH 
41 ; h»: =RINT: EhJDPROC 

SBBDEFFRnCd*! IFri-O'^l THEN EllDPROt; ELSE PRQCbC "dc*i n 
e_t . el ds") : PR INTCHR*1 34 ; "Fi e1 d* ; SPC (2) ; "Type" ; EPC :2) ; " 
t^o. ch--3";SPC<1);"LsbeL";FOP 11=1 TO F:PRINTCHF*131 ;rA 

E>(2' . IK-lf TAB<7> jSI«CI>;> ;TAE <lc>> ; riu < IKl ; TAB CZ7> ; 1 dljel « 
(17.) iNEXT 

3lBPRII>frTAB(0,lS) ;CHR*131;"Press (ft) to edit all Fie 
1rt«5 rvr <B_";F : ") "iPnOrgliTpRTNTTARf?, IS) :Cm*i33;«S=S 



tring 1= Integer N-Numeric. " 
320IN*»GET* 

33aiF iN«-"A" on iN*-"«"TneN r:-i«rz-r> cor 0420 
3401 F IN*-" " ENDPROC 
3S0F*«STF*(F-1> 

360IF IN-l<"0" (]R IN*>F* THEN 380 
370 GOTO400 

3«01F ftSi;(IM«><>13 THEM PROCn 
3906OTO31O 

40BtF INi="0" THEN FI -> I !F2"1 s 0010420 
410Fl-VAL(IN«)*l!F2''Fl 
420hoad*'l:FOR tX-Fl TO F2 
AzarnocL <'?,3»i'4, i,"3") 

i40[F «*»"S' OR o*""!" OR »«""»•• THEN SI*(1X)"3* ELS- 
E PRUCn:GniU43e 

'seiPRnri <tA,x*T/,,7.,'T"t 

'6e[F VAL<Bi)>0 AND VAL(s*)<26 THEN no: r/.i b«mL i««< E 
LSE PROt>i:GDT04S« 

*7«PRt)f:i (27 , 3+17. ,8 , ■ S" » : I abel * ( I '/.) ■«*: NEXT 

*ea ecrro 330 

<i9aDEFPRCCi (XX, YX,LS,t«) 

50ai7,=«:?*=""sf .■dl=::VDU 23,1 , 1 1 a?05«( 

SlUfKiNI IMblXX, Y'/) ;t><HlNb*t(.7., " ■) +t I H. Nbf (LX.CHHfia 
7);: GOTO S3B 

S2aPR0C:n 

S><«IN*-GET*iinX-reC:lN») .IF inX-13 THEM ^70 

540IF in7.= l27 THEN 550 ELSE 560 

550<"POS:tF X>X7. THEN PRINT IN*; : 1X»17.-: : 3*»LEFT*(s» , 
1X):GOTOS3B ELSE 530 

CABiF IX'l.X THEN 520 

S7BIF t*="S' TtEN 62a 

S80IFt*='I" THEN AlO 

59BIF t»""N' THEN 60B 

4BBIF inV.>39 A^D in::<63 OR inX^t27 THEM63a ELSE 520 

AlBIF inV.>4T^ AND inKSS DR inX=127 lllEN63a ELSE 520 

t,T:iair iii-/, >3t n-in mz<ize then 630 CLSCSse 

&3B5*=S»+IN»:1/.= 1X+: 

640'='RINTlNt:i I- 1X-=LX THEN 533 ELSE 530 

ASWir <i*^" ' T IFK S^CI 

6601 ■/.=1X- I :^*=.,EFT*(^*, [7.> : GOTO 6-1111 

A70./f)l. .' ., 1 ,B; j);e;0-. :ENDPROC 

6B0DEFPROCn:5OJNDl ,- 10.0. S: ENDPROC 

69O3CrrT<0Cao: I ■ red', 1 THEN PRtHJd: O-lOFROn 

700^-Rrrh • "Sor t") :PR1N1 • " :FDRM7.- 1 TOFrPRINT^HR* l~2: SPC 
t4) ;M/.-ljCHR*l34:l5be.*(i1X): NEXT: PRINTTAt" (0,3)-. CUR* 134 
j'Tield for sortinq (a_";h-l ; • ) : ■•5UHH*l.iii; 

TlBPROCi <27,3,] ."l"' : I- sJ---" THEN FROi:ii! iOTOy IB tlLS 
E J"ii?td>:=VAL(s*) + l:IF l-ii-lux>F THCN PP.QCo:GDTC710 

72(»=^FtINTTAD < 27, 7 > { F; b1 6V.-1 : PR I MTTAB <2(», S ' ' i cl dt! > i CHR 
#136: :HP4 129; 'SORTING ' iN/.sPs D7:=l 
7303X=2*DX 
.•■»M[FI.7.<;«X tHEN73a 
75(a3X=DX-l 
.'60[)V.=DX DIV 2 
7701 Ft^V. U THKNBHP 

7Beii/;=N/.-Dv. 

;90-0(tl7.^1 TOllX 
O0BJX-IV. 
at PI ■/.=.! v.*OV. 

e2BlF SIs(Field7.) = "3" THt.N 850 

83BIF VAL(At(FiDldX,L7.) ) >VAL(Ai(Fieldy.,JV.) > THEN PRO 
Cs:jy.-aV.-DZ:I-JX>a THENBia 

ftisiing conifnuec on page 1 13) 



VOUft CX»MPUTER, FEBROAH*' I98b HI 



RS232& 

PARALLEL PRINTER 

INTERFACE for ZX 

SPECTRUM 



Connect to projessionai V ^ 

printers witn this improved ^ £^^-2« > 
and cheaper printer interfoce. 




ZX Lcrin- III interfcceenables your ZX Spectrum computer (16 
or4oK) to p'inlonalmosi any dot matrix or daisy wheel p'inlsr 
with RS 232 or Centronics input. Jjstplug in ZX Lprint III and 
LPRINTand LL ST commands will work. COPY works witliout 
any add tional sot ware on Seikosho 1 00 & 250, hi-res 
Epsons,Sto-510,515,STX80Gemini&Delta,WahersWM80, 
Shinwo one CTI...PIls Saikssho GP 700 in full colour, 
copy 01 CGPnS and Micro! ne is optional. 
And because NO additional ssftwore is needed all of youi 
RAM is free totakeTasword 2 or <emp Business Accounts, 
Viewfileetc. 

©WORD PROCESSING 



• HIGH RESOLUTION SCREEN DUMPS 



t PRINTS SPEQRUM AND USER DEFINED GRAPHICS 



■ JUST PLJG IN FOR LPRJNT LUSTond COPY 



m COMPATIBLE V/ITH MIC^ODRIVS & PRESTEL ADAPTOR 

KilO]ELECTRONICS 



DEALER ENQUIRIES WELCOME 

ORDER; To EUROLECTRONICS, 26 Cbrence Square, 

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Front: Narre: 

Add -ess: 



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6.95 8.95 


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6.95 8.95 


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ADO (1 fof i>vviicoioift«f% 




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This order is for: 
ZXLPRINTII! at £34.95 
Centronics Cable ot C9.95 
RS 232 Coble at £9.95 
Tos\vord2alE13.90 



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aidll£4.50+70pp&P 



SINCLAIR. ATARI 
COMMODORE 

COMPUTER REPAIRS 

by the 

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Telsp.unc (l;-; , G'3 5574 

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subject t:) machine 

FOP. INFORMATION 
PHONE 021-643 5474 

CALL IN AT 
58 OXFORD STREET, BIRWIIWGHAM. flS mx 

OR Sf.VD S.A.E. FOR DETAILS 



112 YOUF COMPUTER. FEBRUARY 1985 



(continued 'rom page i Jl) 
many nprinnsj nuTpiir mry Ip. cirecrp.d ro rhe. 
printer or tc thj screen. Only Parallel printers 
hive hcai cattrcd ."or in ihis vcision of Supti- 
lile. Options are accessed through a menu. 

The great beauty of the database is .Is usci 
frierifllini'^Sj so thai ev-?n the ;,'onn[first nernber 
of the fa:iiily way easily exploit the sysjetrs. 

(1) Filename: '/o enter this option simply 
press 1 on the Keyboard, anu imnitdjately ilic 
compute: vAW ask you tc enter a filename. ^ 
filctifimi" is ihi^ Inhi'l oivi-n to your rlun whrn ii i 
is stored on cassette. 

If you Irai'e previously entered a tllenrme, 
then you wiJi be as.<ed about whether you wish 
to change it. Pressing Y will ;llow you to input 

up lo 10 chaiac.cis for the HictiuiiiL'. Any t>lhcr 
kev will return the us;r tt> the menu cnablinj; 
them to use the options. If must be r.oici, how- 
ever, that a lilenanie is rei:iuired it yxm wish to 
enter tht options of Load (3) and Sive (4). 

(9.) Tlpfiin' fiE'lcls: This is thr most wsentia 
option of the database, it must i)c enicrec 
befors any data an be inputted v:a the lidi: 
oplio:i. 1 his IS l>asx.a]ly because .1 dcluu-s areas 
in memory for inlbrmation ;o he itorcd, anc 



:hu^ is lliL- crux of t!ic program, 

Thfrt- are -hree main imnn of flsi;i '.n he 
entered in each field, th^se are: 

■ Tht type of data you wish' to stot« ir. ca.-h 
fieldj ie., .Siring variables — tei ers and 
noribers, integers — whole numbers — and 
nunerics — real numbers. 

■ The maximum number of characters 
illuwed 10 be sl.>red in each field — with a 
masim.im of 25 cha-aa;rs per field. 

H Tht lasel given to each field which iden- 
tifies the contents of the field '.vhen cisp'ayed. 
The mjxiniun number ifdiar-jcicrs allowed is 
eight. 

To cnte.- tlicse impor.ani pieces of dara you 
L-an either press the relevant field number or 
prtss ;\ lo 'cnttr cver>' field.' At any time 
pressing the $pace tar will returr. the user to 
the menu. 

(3) Load: This option J.iad> the prcvnoujly 
stored dali into ilie con'iputer so t.iat it may be 
prccessed. Jt is (.'sscnnal v.^ input the correct 
number of fields foi the file you wis.T to load, 
otlierwise the computer will not accept the fie, 
ant itu: uver will be intornied. lu this o.se, a 
meisage is dispbyec thtt tells the user to start 



agair vi; option 0, and redefine the Iclds to the 
rorrcri \.iU\>' ifynii wish rn Innd rhis parrinilnr 
file. 

Tc acntaly enter a file, the user irust prtss I. 
and then the usual seareliing message is dif- 
playtd on the screen The nor.-nal procedure 
tor iofldinp, i program is then ohser/ed — "efer 
t« l.'<er Guide if unsure. 

W!ien the fib has beer, loaded, pressing the 
space bar will return the user Ui the menu, 

(4) Save: Both opibns Load (,'J) i.nd Save (4) 
n.;cd to have a filename entered, before you ca.i 
access them, if not th; 'No Filename' message 
will be displayed with instructions for the 
apprjpr ate actions to take. 

This Savt o[Mioii obvioasly scores the data o:i 
rnpe, .ind is operated by prcssint; S on the 
kij'board. After this, the "Record then 
Return" mcssaic is displayed, ai whicli point a 
cassette must b.' inserted .ntc the tape tecoLdet. 
The usual procechtre for saving prctrams is 
then followid. 

A.S with most options in this caiabasc, 
pressing the space bsr wilt return the user to 
the menu. 

(continued on next page) 



(listing continued frcm page if 5) 



D40COTOCCJI0 

: lFJ/.>a THFWaiB 
RAVINFXT 
B70t5QrO76a 
880PRnCg 

890PRIN7TA9(20,5+Fnildy.>;CHr<:H30:" SORTED ••.PROC'iBN 
DPRDC 

■fBaDEFPRDCcdiPRflChl-Edit"): IF hBoci-ei THEN PRfJCnh: EM) 
PROC 

Vldr-INl (r> :M<iriTTA&(i<»,^) j " ••tPKINTTftB<B,:i) ) JHK» 

131;" (N> 4or oifxt recorsl. "jCHRSlJB; " < R) -RECORD: " | - 
92air r>R THEN PROCoir-P:GOTO?10 
938 iri-<J THCN r-liCOTOIB 

94aFnR ll-l rOF: PR INI I^ ( 0, 3- ! X> ; OIB« 1 31 ; IX- 1 < CHR*1 i* i 
ljbel*(IV.l;TaB<l I ,i+r/,> ; CHR*:31; "<" ; STR!N(3« (25, ' ")+ST 
R:NGI;(2R.rHRtl77) ;ftl.f Ty.rljTARMT+nn. 17.) ,3+I>» j •■>":NFX 
T 

953PRlN'TflB(4,15);C;HR«131;*(E> to cr.i5e current rmco 
rd":»RaCgl>:PRIhfTTAD<2,16);CHR*13l;"<A) to «dit all fitt 
IdB ar (0_";--lj")." 
9&aiN»=GETC 

9701F1NS-"M" OR lN*-"n" THEN r-r*l : G0T09ia 
9BOiriN*""=*" OR IN».= 'r" THEN ^RCCl :34,2,4,' 1") :r»VAU 
(stliGCTO^lO 

99aiFIN«="«" OR lNt="a"lHEMFl=l:F2=F:3DT0l I0B 
lOaolF IH*-"C" OR IM't-'ie* THEN ICIO ELSE ltS20 
lOlBFORtr.^l TC F:A*CI'/.,r) = "":NEXT;MATCH{rJ«'8:G0T094e 
ia'.MlFINS=" "tHENENOPM)C 
ia30F-*=5TRt<F-i) 
Ka4airiNi^^"a"CRIN«>F*THEN10oB 

tesBGOTOieao 
iH6HiKf»ac(iM*><>:3THeNPR0Co 

tid/idbuiuybk) 

l000IFINi'»"B"THEHFl-l!F2-l:6OTX31100 

ia90Fl=VAL<IN*)+::F2=Fl 

iiiflBr onir.-n nor2: ir rnmcm<'SaB ticn rnoCnim cndproc el 
5E PROCi (13,3*^1"/., notlX), SI*(17.)) :fi*tr/.,r}=s* 

UIBIF ASCts*>=-l THEN tl2a ELSE red = l:M<!TCH<r)=2 

I I'PyiMFXT 

11306010940 

1 1 40DEFPftOOih : PRDCh ( "Fiel ds Undei i ned ") : FROCn : PRINTCH 
R»li!9;' you havf not defined the t tel ds. ": PRINrCHR«12 
9;SPC(5) ; 'Please do so vi » option (2> . "!PRIN":PRDCr :£N 
DPRQC 

I I SBDEFPROC'i 1 1 PRnnh < " Chec k " > : PRI NTCHRSl 2<> ; SPC <a> ; "Are 
you sure ( Y/N>?"' : IN*=EETi: IF IN*="N ■ TME^ EHDPRDC CLS 

E CLeAR:GOTO70:ENDPRDC 

I I fc0DEFPRO&i-f :PROCh < "Fi I ename Unde-f i ned " ) : PROCi; FRIMT 
CWR*i:i«l" Vou have lot dc-fi'^i^d j < » . oniimo. " s PRI NTCHR* 
129!SPC<5>f "Please da so via option ( I ). "rPROCrrEhDPRO 
C 

I 17aDEFPR0Csa;IF red<l THEN PFQCd : ENDPRQC ELSE IF *»=- 
"" THEN PROCn+:ENDPR[)C ELSE PRCCll i "Save" > :PRINT::Hfi»133 
;SPC(5);" Press <S) to save the data. " :PROCgb 

1 16eiN*=GET*s JF [N*='S" HEN 119H ELSE IF IH«=" " THE 

N E^DPROc: else iiee 

liSOVDU29,5, 12,25,8: Z7,=0PENQUT (4*) :PRINT«IZi,F,R:FOR 
IX=1 TO FiPR!NTltZy.,SI»(I7.: ,no{I7.) ,label*(IX) :NE<T:FOR 
rZ-l TO R»PRINT*ZX,Mf\TCH<iy.>tFCR NX- 1 TO F t PRINr#2X, A* 



(MX , IZ) s HEX- N)t , IX: CL05E«Z"4 j V[)U28,B ,2 1 . 39, 3 iPROCr t ENDP 
ROC 

12eaDGFPR0Cdi! IF rod<l TIIEM PROCd : ENDPRO: ELSE PROCh < 
•Display' ):PRtMTCHR*13a5SPCi2) :"Press <RErUf»)> to view 

oach f I It... -jVOUSa,; , l?,38,7;PROCp«:VDU28,0,21,39,3iPR 
OCr : EI«PROC 

izieixcrrnacpD: IF sc«i then sei»2 else SEi»t 

1220FnR I7.»l TO R: IF "tATCH« I •/.)•■ OP MATCH ( 1%) -SEl THE 
M 1300 

13TOIF NATCM (!'/.> .•a OR HATCIK I?.) -eCl THCN 1300 

12401N*>6E-S:IF ASC(IN«}-13 OR A5C<INS)<>52 THEN 1250 
ELSE FRrH;fnGOTrj li!4U 

12SMIF ^iSCIIN*>-13 THEN CLS ELSE ENDPROC 

1260PfeINT-CHRi:i29;'Rc:ord: ' ; It'. 

l27aF0R NX" I TO F 

12e0PRINTCHRSl32? 1 *t>ol *«N7,) % TAB < ie>'j " : " j ::hR»131 ;rt* (N/- 
, I 7.1 

1290NEXT NX 

t3e0NEXT ly. 

t r^lOPROCtoc • CNDFROC 

I32ODEFPROCr:PRINTflB(0,l7);CHR«131; " PrM» <SPaCE> 
-o return to";CHF»129;"MENU. " 

13J0INt-GET*:IF IN*-" " THEN ENOPROC ELSE 1330 

13itODeFpftOCcil>:PfiIN-TA8<«, !7) 5CHR*l31i • F>rM« <SPACe> 

la rf.turn '.o ";CKR* 1295 "MENU. ": ENDPROC 

13b0D6FPROClo: IF **="" THEM PRQCnf :EMDPRDC ELSE PROCh 
("Laod"):PRtNTCHF*133;SPC(51; "Press <L> to load new iX 
:«.":PRaCqb 

l360IN*=eEr*:IF IN*=" " THEN ENDPROC 

i3?air :Nt-"L" en :m»-"1" ^hch isqo else pnocuiOOTOis 

O0 

l3a0PROCc:yDUEB,5, I2,2;i,8i :V.=OPENJN <-«) t INPU'I»ZX.,F4 , 

RAiPRflCci :; IF ra- :>r thfn fnoprop 

1390FaR I7.= l TO F 

I4«HINf'UT»r/.,Hm IX) ,no(I7.! ,l*bfl*' 17.. 

1410NEX- 

l4?0FfJF< 17." I TO ft 

l4:.OINP0T«f7.,MATCH<t7.> 

144QF0R N7.= l TO F 

I '\ Mt INPU \*tY. ,1^4 (N7. , IX> 

l4i0hEX- N/.I7. 

1470CLO5E4tZ'/. 

I 4 3UVUU2k),n.21 ,39,5 

I490red=l :head=l 

1 SaaFROCr : ENDPROC 

lt,l«i:FF<'HUCck: Ih F4=F Tt-EN ENJPROC ELSE Vnil28,B.21 .39 
.Jt^RCChl-'Mismatch". JPHl^TCHH»l30:"!f vou wish to ^Acce 
•v*i this -ile then": F'RINTCHRs 13a: "you mutil rede-ine the 

no. cf Melds to" :PR INrCHR! 1 38; "be : " ;CH=4*133;F4; CI'R* 
l->W; "cnlv. ihis will give you ;"; 

l5.''BFRINTCHRH33:r<4:PRINfCHR*13CI: "records end will be 

coT>p=tibl«> with' rPRIf^rrcir-lf :30; "the file ycic w; 5h tc 1 
oad.r-leose do ■•.u' . rr* I f-TTnt n*-.3aj " * i .-, option (0).":r'RCCr 
: ENOFFUC 

r.i>ai;FFPSO:c:FQf:K7. I Kl F:F0RJ7.=.J "D R: A* (X7., J7.)=" ": N 
EXTjy.,X7,: ENOPPOC 

1540DEFPRDrp:IF roJ< 1 THEN PROCci EMDPROC ELSE PROCh ( " 
Printer dump" ) 

15SO»FX5,l 

t560*FX6,0 

(listing continued on next page) 



YDUft COMPUTER, FEBRUARY I0S5 1 13 



(Cootirued (nm previous page) 

(5) Edit file: TliL- fiflh option in the menu is 
ilic cdii p-ocedure wliirh illows the ahcriiig 
and adding of cata to th; Oe. All data is 
initially eniertd via ihis opiioa 

C^ncc ihi- Hser has accessed thiB section of the 
systjm, tlie fields defined will le displayed 
followed b)' the space pn>vidcd for the numb.-r 
of" characlers as defined in option 2 for the iield. 
Ahcriri!^ data in a particular field mzy be 
cchieved by typinir die field nainbcr iilU-wing 
data to be entered in ihc space proviced. 

AleriativclTf the whole record ca.i be 
LHtcrcd by pressing A. Erasing a v/hole record 
may be achieved by pressing E. To ai:cess the 
next rerord simp y prtJt*: N or if you wiah :o 
tdit a parti:n.ilar recoid press R followed by the 
record number and Rcnr». Agaui the space 
bar wil reuirn ycu ta the itjcnii. 

(6) Sort: The sort option enables the u>er .o 
put the file in oider utcordin^ tc a;:y of the 
fields defined in opticn 2. 

If the field has been defined as numeiic or 
inlcj^er then the order vill he :)f the jlcebraic 
nature, ot-icrwisc the file will be oniertd 
according to choractcr vilucs. 



Us-ng the 3>rt option requires only out 
entry; iIk- user must chocse the field on which 
the sort is to be based. Once the swting is 
complete ih; user A'ill be able to return tc th< 
nicnu in tht normal way. 

(7) Search: Thij is prcbably the moit uicful 
fitrilitj* of any database. However, Supc-fik has 
a remarkably eiTicicnt and rapid search thst is 
erifianced by is special mistufe of machine 
cede anc hybrid Basic. 

Sc4«rch criteria used arc the wiJtly <«.vx:Jied 
nwihemslicd in-cqualities — these are as 
fcdlovs: 

1 >: greater than. 

2 < : less than. 

3 - : equal to. 

4 > = : greater than and eoual to. 

5 < = : less than and equal to. 

6 < > : not equal 'o. 

For the "equal to" jign, the tiser may e:itct 
part cTa siii.t};/iiuutbci, uud dieri the comp-.iter 
will search tor all occuircnces of thi com- 
parison. Only on^ search criteria may be 
entered :>er field, but inany fields can have 
conipirisons thus pedbmui.g i tmiliisearch 
function. 



The number of Items that the computer has 
found which satisfy the cond lions defncd is 
printed on th.* screen a> thi»y nn* Innnd. Ihese 
rec-ird-i can then be seen cither on thescnicn or 
in the "orm of a printout on the piinler. Screen 
unc ptinicr uucpuc are explained in ;>pc.otu H 
anc 9. 

(8) Display: This option is .ised ro print ihc 
records on the scrctn, :hese may on y be cis- 
pla/ed if they contain data. Pressin; Reti;rn 
wit allow you to view the next r-^roid. When 
all records have teen displayed, the toials of the 
numbers stoted in the intejier and nuinerir 
fields will alsi> be printed up. 

(J) Priaicr dump: As explained earlier, 
chis vcrsiin of Supcrfilc can only caljr 'or 
Parallel printers. VC'e advise that you only use 
thii option i:' you navj a pr nter oirvnc>rtwl, 
otherwise the computer may appeal to hive 
crashed. 

(0) Start a^aia: This opticn i; used it the 
use.' decides to change i;ie format of the file, or 
if h-: just vishes t:i cl?ar the memory. The con- 
putjr asks you whether you wisli 13 cliange 
your mind, just as a precaution bclluc die 
computer clears the entire memory . ■ 



(listing continued fnm previous page) 

157ePRIN7CHR*151;" Pres*. <RETURN> tc vj«t* ^ach racord 
" : PROCgo : V>DU28 , M , 19 , 39 , 7 ; C-S: VDIJ2 

ISBB 1= SE=1 THEN SEl-2 ELSE 8E1-1 

J59eF0^I*/."l TO R 

I6B8IF MfiTCH(ly.>-IB OR MATCHtlXi'-SSl THEN 1638 

l«iniN»-^l.-tl*! Ih iN»-- • 0=* PSC1II»J»}''13 THEN 162B ELSE 

PROCn:GOTOI6Iia 

162eiF IN*-" " THEN VI>U3 1 tf mJ28 , , 2 1 , 39 , 3: ENDPROC 

J63ePRIN7CHR*)3'?»"necords"iClin»133; iy.;rORNy.-l 10 Ptf*« 
INTCMR«12<f}I.i|jvl«(NX>fTAB(9>:CHR*153;"! ' ;A»(NX, lY.i :NEX 
TNV. 

164ePRINT 

lASeNEXTIX 

166«PRJCtotiVDU3:VDU2e,a,21,39,3tPRCCr jENOPROC 

167eDE*PP0C»e: IF r«c< 1 THEN PROCd: ENDPROC ELSE PROCh ( 
"S»«rcln" ) :Se-l i PRINTTABCB, 2> ;CHR* 150; "Fiel d" ;TflE CB. 2> i 
"EqiMl lty'';TAB(2e,2} ("Comparison" 

16BeF0=^X?:-l TO F 

1670PRINTTAb<e,34-X7.ltCHR*131; 1 «DBl » (XX> ; CHKVI^^I IKKIN 
TTAB ( 12, 3-»xy.) ; CHR*13'(;"<";3PC (not XV.} );'■;" 
ITBBNEXT 
t7i»iFmxy=i TO F 

173ePR3Ci(ie,3*X"/.,2,"S") 

J74BIF «««"■ THEN IBIG) 

t758IF s«="<" THEN Value"! ELSE IF «♦-'>" TKEN Value- 
2 ELSE IF r,*="«' THEN V»1ub-3 ELSE IF sl""<>" Tt-EN Val 
o»-1 ELSE IF «*-"<•■' THEN t/alue'>5 ELSE IF ^«»">=" "HEN 

valuer;, ELSE PKUUi:t>u ml /iW 

17&aiF SI* <>;■/.) ""N" OR SI*(XZ)-*I" then V»lu«=Valije+6 

177001. (XX> -Value 

17B0PR3Ci < I' , 3iXV.,no<XX> ,3tS<X2) ) 

1770 IF s*="* THEN PP0CotG3TCl 780 

lBeOITcM«<X>.>»s* 

IBltlNEKT 

182DFl«a 

1830raRXX=l TO F:IF AL(X7.J>''1 'HEM Fl=«l 

1840NEKT 

1H:j01FF1=1 THEHIBSH 

lB60PR0Cn:PriNrTA8<e,l5>;:HF*129j 'You cannot search f 
or any items as you"!PRINT~HR*l29i • have not defined a 

ie70PR0Cr : 60T02 1 80 

lQB0PRINTTABC3,15);CHR»133;"Are you happy with this t 
V/N)'" 

1 690 I N*=GET*r IF IN*="N"THiN PRINTTABtS.lS- iSPC(33; ; sF 
OFIX=l TO F:AL(iy.>=0:NEJ(T; SCTO 16?0 ELSE IF IN«="V" T 
HEN GOTO 19BB EISE (31. TO ia?0 

19aOCL3:T=0sFAtl '«:FRIMTTaB<12.6> :CKf^*129:CHa*141 ; "MA 
TCHED "I r:PR]NTrAB(12,7';CtR»12<'jCHR*141;"MATCHED •;T 

1910FOrtX-X"l TO R 

1720IF H«TCH<Xi)=e> THfeU .fl IK 

1930FOR.r/.'- 1 I (J F 

1940 IF AL(J>.)=« THEN 2870 

1950ON AL(J>;> GOTO 1960, I <?aC!,SQ(lfa, 2010,2050,2050, 1"?7B 
, 199«), 2000, 2020, 2040. 20^0 

l96aiF M(JZ,r/.><lTE»*iJV.> IHEH 2B7e ELSE FPIL-1:G0TD 
2970 

)970iF vAt(ft«<jx,xxn<vALtnert*(jy.)) then 2e7a else f 

A]L=I J6OTD2070 



1980IF A*<.r/,,xx>>nEM«(j-<) then 207a else fail=ugotd 

2078 

l99aiF VAL (A*tJZ,X"/>>>VAL( item* <jy.)> THEM 2870 ELSE F 
AIL=l;6OT32C70 

7flan73TM^Tf;(a-«:<j-<,x%) ,tTCH«<j:i>> ■ IP 20a TiiCNzere clo 
e FfilL-'l!3OTO2870 

2B10IF Ai(0V'.,XT4K>ITEM*{jy.> THEN 2070 ELSE FAIL-UGDT 
02070 

2020IF V^L(A«:j>:,X*/!>»<>VOL{ITEM*fjyj ) THEN 2B70 ELSE 
FAIL^liGOrO^O?© 

2030IF AKJX,X7'.)<-ITErt*(J7.> Tt-EN 2070 ELSE FAlL-liSOT 
U ^u/10 

20«0IF v^L<As:j;:,x'/>}<>vAL(iTEM«:jy.i ) then 2070 else 

FAIL-l:6Oro;07O 

3aseiF Ar <j%,ixi >-iTCH*tjx> ticn zero else failohoot 

02070 

?«6aiF vAL(A«;jx,xy.)>>-vAL(iTEM*:jy.t ) then 2070 else 

FAILol:G0r02a70 

2070NEXTJV. 

20e0IF F^-tlL"! THEN FAIL-BsGOTC 2110 

2a<f0MATCH(XV.)-l 

2 1 e0T-T H : PRIMTTAR (22 ,6> ; T: PR INTTAB< 22, 7) ; T 

21iaNEXT<7. 

21i0PRINTTAe(2, 17) ;CHF*133r'Pririlor or scre»n autput 
<P/S>?" 

2l2eir4«-6eT«; IF [N»-"F" OR IN*""S" rHEN2J4B ELBE SOTO 

213a 

?14« :F IM*""P" THFN FRQCp SLSE PROCiJi 

21S0FOR fV.-l TO R 

2 160 IF MATOttlX) >-l THEN MATCH C I 'a ) -2 

2170NEXT 

2iaeSE-B:Ft«I/>lT0F!AHIX>-a> ITErt«(I7.)="'':NEXT 

2190EHDPROC 

2200DEFPROCd : PROCn : ^RQCh ! "N3_Data " ) : PRI NTCHR* 1 29 ; " Yqu 

;an t en^er trt^ option befor*^ you" ; PRINTCHR*129; "hav 
e inputted any dat.i. Please do so' :PRINTCHR*129| "vt a o 
ption '5) . "jPRtJCrjENDPROC 

;>;>1»I)KI.PR0C=«(»-MATC HL/.) iHATCtHLyi -nr,7ZH<J%) iMATOKjy. 
>=m:FORt':y.»l TO F:S*=S|* <Ky.,.7yj « A* (KX, J'/.) =A* <Ka,LV.) :A*<K 
y.,Ly.) =S*: NEXTs ENDfRO- 

2220DEFPhOCQ:>y.=O:RiPEAT:Xy.aXX+1sllN-TI M<:tch<XZ)<>2sV 

y. xy.-i:PoR Ky.»i to </y. div 2»:F0R jy.-i ro FsS*-A*tjy.,K 

y.> :ft«<v"/.,l,y.)=A*(JS,YX.-KX+l > jA«(jy,,Yy.-KX*l>-S'*:NEXT J*/., 
Ky.:ENDrRaC 

2230DEFPKOCtot : FOR I7.«l TO F: tot <IX: ^B: NEXT 17.: IF SE- 
1 THEN BE. =2 ELSE SEl=l 

2240FOR Xy.>=l TO R 

2230IF MATC-KXy.)'© OR MATCH ( X/.) -£E1 I HiN :^;if(fl 

2260F0R jy.=l TO F 

2270IF S:*(J7.><>'S" TJEN to'. (.IX)-tot (JXl+VAL CA*( JX, XX 
> I Fi r.F 77RB 

22BaNEXT JX 

?29aNEXTX7. 

230aCLS:PR]>IT:PR]NTCHR*129; -TOrALS" iFOR ly.= l TO F:PFI 
NI CHS* 133; I aoel* < 1 XJ ; TAB < 1 1 > : " : " : CHR*1 31 5 sPROCdecs 'JEXT 
iFNr>PRCC 

23iaDEFrHiTn»n DIM PX-lr-HlMEtl -PX 

2320DEFFPOC«iiiitPnCCIi :"1-J»» Mcniir v" ) I Pf*OCn; P^t IISTCHR* 1^9; 
"llnfor turtAtejy yni.' are r I or.e to the ":PRINTCHR*!29; "me 
Biory limit. Please a*ve file now. "iGNDPRQC 

233aDEFPRDCd«»r: IF q** f Ty.> = "B"TMFN PB »N "CHR* 129»N/A" ! E 
NDPRQC ELSE PRINTtot : IX) : ENDPROC 



'14 YOU^ COMPUTER. FEBRUARY 1985 



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LIGHTNING f 



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Tcta .y {^eoicoted to v'riorg very 

(i iij/y structured (;<tcnt(>)n to the 
Corrmodorc 6A5/C whic/- odts a 
stoggdrrng 200 reserved »vcrcs. it 
oi/oivs (j3 to/(ve rosiy to mn 
concurftritly(onii in wegrouidond 
/burn fccckgrouidl Woit of ;/ie 
coirrnnrris ore cediMtoW ;o gomes 
v/ri't fig f nd the sound ono' grdprtcs 
co/rmands are i,nparo//f 'ed. 
ProcedtJ'es oRd MSCAf (y^je irrynufid 
projrofrmifg commands oreo/wo 
/cotirre orBAS/CLightrjirg. 

As wisl/os trte Commadore's o;vn it 

^flr</wofe spriiei. BAllCbghm'n^ ho: 

lU a,vn software sprites. Up to 25 J coi 

be cafimd w(i/. user %e/et'tot>e 

diiTimms. r/iese ccn eien f« ic-crci 

scrrens /Wde. T ^ey con bs scrolled. 

spun, mrtonni, cnlorp^e^or invenod 

v//tri p^enonlenc/ speed and 

imtoihress. 

A Spnte ScneroforPr^grflm 
(wniten m BAS/C L<g/itm>)g; <j u/» 
supplied and ton be jsed to design, 
edit andsioic cliynw spHtes for i se »p 
/our mom ptogrom. 



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Con '^ody^ 6'' A!oc"(.'re I g/iin n;? 
'r'opfll.iy tf.» cnost (Jd/oncw'go.Ties 
• ri^guti.Vtyovd/aiJte or i-inf- micro. /? 
.■(jm ?;("•'■ pjj.'fs: 

/MACRO ASSEMBLER,' 
,VION;TOR/D/JASS£A«BL£R '^jsis 
■::rcxblyLhe -^lOJt coriprsnersc'C 
nothine cndi ce-'doprreii s^sten 
jt/otbhif fo' ;he Con mccorei'? vit/i 
'^ott-ex too lurr eroys tc merrjor. 

BAS/CKGHTMNGBAS/C 
-Lfg/itnmj, ikt rtjIi-tsski^iBASIdsalso 
ct'O/ded to fsc;':oteej<ce"n'wroi'(3nir 
ji-^tnrcii/oT for/c'er JSserbV. 

SPft/T£ GCNEMTOR Use^' to 
'hvdap ah :^e gr;pnicT fa the /Inoi 
^me. Tfte ^nteGenerctor n:s nvmfr- 
jus unctKifit ircitditg en''0''|emert. 
oiafion 3.'icrer€ct(oi. 

OB/£CT LIBRARY frhis h'acninc 
jghrnn^'i aosr •jowirfulf^O'-ure Wk 
o' rcernramcock wkn rruftthar. 130 
jxi Tenteder):^' points Tntse ere 
/le f 01- lines 'hot provide jll the 
j'jperfost grcp(t'« rojuocr m VV.'ute 
^indecsrlf^cnng. Theyconto/D 
Wfti-tiiiy over/ rouonoyoL 71 ever reed 
:o wrictfnA'CCKfe Guncind 
Tiu/B-tflj'ong n Mco'KneCig/tn'n^ <s 
.vjvored fi tre compfEhensiVf 
ccccmpdnying nunuoi. 



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L^ST .MONTH I covered the programming 
model of the 68008 and its address.ng modes 
A hripf intrflHn-ii<'(n tf» &e instr.iction set wa* 
made and this will be expanded in tiiis anicic, 
together with a mjre complex prograir. 
example than the one given last mwith. 

I will describe the instruction set under dglii 
general he^Hings, nn'n(4y (Jut-,* niovcmcnc, 
jiriihrneiif, shif and totaie, bit manipjiation, 
binary coded decimal, prograra control anc 
system control. 

Th; basic Move inslruttion was mvcrcd last 
n¥uii!> li li:i«j ««-v(T:fl v;ir ants Move muliiplt 
registers — UoveM — al.owi several r;gifteri 
10 be moved to or loaded Irom meniorv in one 
imtruction. Move quick — Mo^el^ — albwv 
ait eight bit signed nninhc- ~ i.e. from - 1 28 to 
+ 127 — to he sigT Mfendfd nnri l<\ad«1 to t 
data register. 

It is called "quick" as liie whcle instruction, 
including tlit njinber, is inly one v/ord — i.e 
ivo bytes — long. Ncie there a.-c other qjick 
irKfnirrions in he ftHdOK instrxiction set. 

Mcve perpheral data — MovcP — iran>fcrs 
data between a data regislcr and illernaic bytes 
of mjinory, and is inierded to siitiplily the 
trinsfer of data between the 68;K)8 and 8 bit 
peripheral d.'vices. I have nor thitnd rhi^ -a very 
Uieflll inslructio[i for the QI. so Hir. 

Load eflcctive address — LEA — allows ar 
elTective adcress to be computed and stored ir. 
an address register. Tliis is a nuc.i usee 
instrisrrirtn ftid ;ui I'vnniplc will help. Suppose 
wi: have opened a channel using a QDOS 
sjstem call and stored the channe. idem 
returned by the ca.l in a long variable labtllcc 
channel. Then to actually oad the channe 
ideni into address rcj^isttr .i") wp will np'crt t: 
fngment of code such as: 

LEA channel, aO 
MOs^E.L (fcO).aO 

Pu^h tflective address — PEA — computei 
an effective address in a simikr way :o the LEA 
instruction, but pushes it onto the sack ralher 
tlian itoiing it in an addrjss register. 

RxvliHitgc ie(^ii>icis — EXG — exthar.ges the 



cortents ol any register wit.i any other rejisttr. 
Note that the whole 32 bit conicnt* o' e«ch 
register is exchanged. 

Link stack — Link — ind unint stack — 
UNLK — are related instructions Link causes 
theanreni cuntent.sofan aldrcss reg.stei to be 
pushec onto iie stack. The acdrcss register is 
then loaded with the updated co;)tcattt of the 
stack ]X)inter and a s.gn-c}ctcnded displacement, 
which is a pat t of the iiutruciion, a then added 
to the stack pointer. 

This cai bi used to create j stack frame in 
wliich would be tiored k>c:il d:it:i ^tc, is iised in 
high lc\'cl languages. UNLK i«stores the stick 
anci appropriate address register to its stite 
betbrea Link was executed by .oajiiig ihc st:,ck 
[xiuiter fioni ilx: i^ddtess register and then 
loading; the address .-egisiei frcm the lop ofihe 
stack. 

The ADD instructio:) adds the contents of 

the dc,Minati<i:i efleciive address tc the contents 

of ihe source effective address anc th: result is 

stored in the des'.inaiion etVective iddrc:-.:^. The 

additicn is binary. As a;} example suppose that 

data register do contains $100 — i.e. decina! 

256 — and that address register aO points to a 

variable vhich contains S200. Then the frag- 

meot of code 

ADD.W (aQ.dO 

will store the result -.vhirh is $300 in dO. There 

are several variation, on this instruction wh.ch 

are applicable to niLtiy oilx-r of the arithmetic 

ins'.nictions. 

First, vvi can have Add.B, Add.VC' and Adc.L 
prc-ducing b«e, word and long results resp<ct- 
ivdy. Hiil.ci die Jc:>.iiiaiiuu ui itic Murcc m jsi 
be a data regi:iier — i.e. it is not possible to add 
the contents of two memory locations together 
wiihoLi first nim-ing o.ae jf then into a data 
register — bvt see AddX beloA'. 

The add address — Add.-^ — instruction is 
sirr.ilar to the Add .nstrucion but the cesiiia- 
tion must be an address register — and so aze 
byte is no- altowcd. Add immediate — AidI — 
specifies i.ie souice as immediate dan, and add 
quick — AddQ — provides a "quick" 



immjdi'cle add of from I to H. 

Acd eitended — AddX — performs an add of 
sourre rnd dp^rinirion .ind rhi- cvrcnH br. U 
has two versions, either add reg.stc; to register 
or add meiTiury to nicnicry. 

Ihe extend Dit, when atlcctcd, u set to the 
same as the carry bit It is unaJectcd by data 
movement insiriiciion. Note that rhis allows 
multiple pr.'ciKton arilhiretic. 

The subfact instrurtion — S<..b — and 1:11 its 
related instructions, i.e. SubA, Subl, SubQ ani 
SubX work in exactly the same way as their 
eini.'aleni Add tKiniriinm i^virpi h:ii iln> 
S"iur:e is subtracted from the destinaticai — and 
in the case of SubX the extend bit is tlso sub- 
tracted. 

Multiplication of iwo IC b.t nuiubets to 
jiroduce a \2 hit u'snlr cm hf tirhiT unsi^nH 
— MulU — or Signed — MulS. On; of the 
multipii:anis must be in a data rcgistci and the 
resu'.t will be placed in this same dita rcgsier. 

Simil;;rly there ?re two divide instructions — 
DivS and Hivir — whirh divide n ^? hit 
number in a data reg.ster by a 16 bit .lumber. 
The re>uli is a 16 bit quotient in the l-wer 
word of the data regis'er and a 1 j bit remainder 
in the upper wore of the data register. 

The coirparc — CMP — instnicrion pe- 
forn:s a sLbtractiou of the sourcu f-oir iht; 
dcstinaton. and sets [he ccndition codes 
accordingly bit does not cnanje ;he destina- 
tion. There are also similar compare acdress — 
CM PA — rnnipsr?' imTiiKti;iif — (7MPT — -atvI 
a>miarc memory — CMF.W — instri-Ctions. 

Negate — Neg — subtracts the operand from 
using 2'j ccmplcment arthmetic. Ihere .s 
also a variation cf this ins ruction using the 
extend hit (NF.CIX) for miiltiprtriftirtn ariih- 
meiic. 

The deaf instrurtion (CLR) clears, i.e. stores 
zero ill, the operand. Note that, as with most 
instnicions in the 63003 insirjction set, this 
instruct.on dors not work wih ill elTective 
addiessing modes. In paiticular it is not 
possible to C.I.R antl address register. It is 
(conUnuea on next page} 



YOURCOIVlPJTeR. FtiB=tUAHY I9£5 117 



(cortinuod from previous page) 
oiten n^cejsary to d-ar address regisier a6 is 
some QDOS system calls require addresses in 
other rsgisicrs relative lo a6. To do tliis you 
can ins.eac use the irisltuct.nn 
CUDA a6,a6 

The sign extend instruction — Ext — will 
sign extend a byte lo i ward or j word to z Iodr 
number. FJTcctivtly, this means that far l byte 
to vord extend bit 7 wi.I be ccpied into bits 8 
through H, and sirrilarly for a wore to long 
extend bit 15 will be cDpicd into bits .6 
ihrcugh 31. 

The lest ins:ruction — TST — compares the 
operand with zero and sets :he appropriate 
flags. The test aiid set instruction — TAS — 
tesis ih;; byio operand setting ti\e ilags accord- 
inglv, and ihe most sign.fiCEnt bit — bit 7 — af 
the operand is set. 

Tliis insiruciion would ncrmjlly be used in a 
multi-procc55cr system foi svi.i.hiuiii>atiju jf 
several processors, which does not apply o the 
QI. of :ourse. 

The standard logical operations of bitwise 
and — And — inc.usjve or — Or — cxdus.ve or 

— EOr — jnd invert — Not — aic avuiluMe (i.>i 
byte, wore and long size of" data, FJihtr the 
source or tlu ccst nation must be a data 
register. There .s also a set of immediate 
instruciions, i e. Andl, Orl and Fori. 

Shift anc rotate Jnstruciicns havi: huh rig.it 
ijnd Icfi vcrsitins. There arc arithraetic shift — 
ASL acd ASR — and logical shift — „SR and 
LSL — mstructior.s. ASL and LSI. are 
idertice.1, ausing a zero to be siiified itxo the 

light hacid nidc ja thi: left shift takes place. 

ASR causes the most significar.i hit to he 
rctaincc as a right shift lak-s place, with the 
Last significant hit failing otT the e:id. The 
I.SR instruction is similar, but a zero b shillcd 
Li ai th- tcTt hand end. 

The number of bits ui be shifted can be 
spedfieJ as cither immediate daia ir. the range I 
t3 8 bits, 01 else in a caia register in the range 
tD 63 b:ts. 

The rotate iniuruciioni hxvc both righ'. and 
l.-ft ver>ions without extend — IIOL and J.OK 

- and witl-. extend - ROXL and ROXR In a 
rotate instruction the oit .vliich would "fal " ofl' 
the end is fid back inio ihe oppnsite end of the 
register, and ilco into :he CQiry bit In ihc 
extend versior. bcth the carrv and the exictxJ 



bits aic ^eu.cd. 

Four extremely use.ul bit insinicticns are 
avjilanlc on the 6S008. The bit to be mini- 
pulaied can be specified as sit her imraediate 
data cr as a number held in i data register. 

The bi' icji — BTST — Inttiuvlioii itsis> die 
State of a specified jit in £ register or incnwry 
location tnd rcflccis it in the :ero flag. The bit 
tested is .not modiiied. 

The bit test and set — Rset — insiruciion 
icits aid teflccis ilie sine of the bit in the 7ero 
flag and sets the bit to a one. 

The bit test and clctr — BCLR — tests the 
bit as in Bsd but resets the bit ly zero. 

Finally, the bit test and change — BCHG — 
tens tlic bit ijiiJ then iiivciis il. 

Thiee instructions aic inc.udcd which 
operate on byte sized operands and perform 
BCD arithmstic T.ie add decimal with extjnd 
instructicn — AHCD — £dds the source 
upeiuiid iitiJ dcsiiiiaiiuii jpeiaui a:id ext'.:nd 
bit together using BCD arithmetic, placing the 
result in the destination operand and if ne:cs- 
sary setting the cviend bit to allow multi- 
precision BCD arit.imetic 

The ofcraids nii^^t ciihji Kill: lie ;.uulai:icd 
in data r:gisters> or eke in neniory locations 
addressed indirtalv through iddress registers. 
In the case of memor>' to memory addition cnly 
the predecremcni addressing mode is aviilaDle, 
to f»e.1itMc mxihi-prcciiioii addition. 

The subirtct decimal with tsctend instruction 

— SBCD — subtracts the source operand jnd 
cx.cnd bit from the destiration opeiand using 
BCD :iriihm;tic. The addtessing modes arc the 
same as for the ADCD iii>iiuk.tii.ii. 

The negate decimal with eitiend instruction 

— NBCD — sublra;:ts the destination operand, 
which is of size byte, and the cxtenc bi., from 
zero plac.ng the result in the destination, 'llius 
the tmtrtiction produces t.ic ten's ccn)(i(eu cm 

I of a BCD ntmfcer if the exierd bit is reset md 

the nine's complement otherv/ise. 

This month's program example procuces a 

I directDry of the cartridge in micrcdrive cnc ind 

\ lists t.ic number of sectors taker, by ca.h "ilt, 

so.nietliing vhith Is [X)t provided 'or in the 

normal QI. DIR command. I have kept the 

program down to a reasonable length so as not 

to obscure tne structure unduly. It is quite a 

• simple UMiter to extend this simple program lo 

I give other features such iS directory of other 




driv.-s, selective Ikting of groups of files etc. 

The parts of th; record we arc interested in 
src the file length, which is a long word and is 
located at tlie star, of the rccorc, and the name 
«f the file which n scored in normal QL strir.g 
format with the Ofme length stored as 3 word it 
bytes 14 and 15 :>on the start of tht record, 
«iid the actual name .vhich uarts at byte 16. 

The program stirts by openir.g ciantiels first 
to the diicctoiy llhcl.' iiiid iliei. ((^ the suce:i, 
which i, the channel used for output, sy using 
the QDOS io-opcn system call The carlridje 
name and count of empty/gDod sector% is then 
fetched witii QDOS filing system trap fs-rndinf 
^nd (hcsc details printed. The piot^iiiiu (hen 
enters a loop. 

Within this oop a check is made foi the erd 
of flic inar.<er from the directory with QDCS 
call io-pend, exiting if it is foind as we have 
now ici.d i.ic whulu diieiloiv. Ifei.d uffilc not 
found the next record i> read into a 64 byle 
buiLr. We tiOA- test o see :f (l,e file bngth or 
name length arc zerO: as if they are it .ndicates 
that this is an old file wh.ch has been deleted — 
in this case we branch back to the stai t iT ihc 
Lnop, 

If we have a genuine file reccrd we calculate 
the number of scaors from .ts l;ngth tnd print 
the sector count as a de:inial nurr.ber using a 
QDOS uiiliiy e;ill lu-iiiini. We tiow niove ihe 
prin; position to column four with QDOS 
screen driver call sd-tab and print the name 
string using QDOS i.) call b-sfirg Finallj' we 
send a line feed character '.o the screen with 
QDOS iu (.ttll iu-sbyi;, uiiU ilicii b.ituch i.) the 
top of (he oop again 



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((ist'mq continued on page '21, 



•18 YOU=^ COr^flPUTER, FEBRUARr 1S85 



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YOUR COMP JTER. FEBRUARY 19£5 


121 



JFnst World War AerialComl 

l^tastic 'Point otView'Arcade Action. . I 



•••• 



KCiHng 3-0 acUon nrtakes SfcNTlNEL ihe Trost realistic poin»-o(- 
view gsme you've evorplayed. You're on s starship comrnand 
decK with th© Ifttesl in ultra-sophisticalad computerised 
instrumentation. Use 't tonovioRte through (deadly aiteraid belts, 
^destroy eremy ships and1racl< their bati'eatars throagh 
Iniorgslactic mineJlelds. Aiong the way )Ou''l dock £nd retusl. 
It's to jgh duly but you'vn earned the command. Now cenyou 

firsvent enemy fcrces from capiuiing ycnr horns plsnet?^ 
t'saH in your hands. , 

Conrunodore 64. / | / 



y^' 



ATARI 



r^V 



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^*tes 



SELECTED 

TITLES 
/VVAILABLE 
SOOM FOR 
SPECTRUM 



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^\ 



-H 



^A 



1>V 



ld&: 



/ I / T 



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aee 



Yl>u'r«atthe controls for this 
World War I dog/lghi aame. 
Shoot down enamy pi«n«$, 
bctnb targeis, strafe tanks anttgun emplacftroents - there's conitant 
action on the Incredlbla 3-D ditgonally scrolling scre»n. At ttw same 
lima, you Uavo to Voeplrack o' altituda, speed, fuel and damage. 
Medals don't com« easy, rou must m jat«r a series ol flying skills 
and p€rf omi tham wit.'i piifw'nt accuracy. One silp end youVelctst 
it all "ovan your life. Happy landings, ace! / 

I Commodcre 64 and Atari 



e«t! 






.^ 



^- 












I sounds anr("''"ff / 



n&Kmstfm/x 



Do you have a problem? Your maruel is 
incomprehensible or you just cannot get the 
hang of that prcgramming trick yoj tried — 
wha:ever it is, Tiiri HartneJI will do his best to 
answer your queries. Please include only one 
question ppr letter and mark thenn "Response 
•^ranne". 



SECURITY SYSTEM 

1 1 own a Vic-2D and have just 
fiikinhcd a program which 
reiurAS information to the user 
when a password ti- entered. For 
security, I have included a line 
zero in the program, to dis- 
enable the Run Stop/Rcsiorc 
functions. This k intcnJcd to 
stop a user from breaking intc- 
the program while it is running. 
However, when someone ioads 
the program, Run must be typec 
in before the proKrum will work. 
This, of course, gives the 
"pirate" tiroc to list the 
program, and discover the 
passworti. I have hcurd of an 
aulomaiic run ^c({uc^cc, such as 
the one on Aniros's version of 
Krazy Kc.ng, hut 1 eannol li:;! Ihe 
prut>r.iin to diicover tlit basic 
idta. I'icase cao you assist? 
Ti'iWthy Can-m, 
Rcchdik, 
LmnvliirL 

Thhrb is so Minfc; IVkc oi wUuicvc. 
which will %w<i you aulomti on (lie 
Vir-2f, "I'TTioihy. A nuichini- rouiinr 
lo do U would be sjim 91) lo lUU 
hjii-.s lonj, One siraplc ih.ng ynu 
cojld do wcuEd be* to 'bide' ibt 
paisw'>rd wii.iin ihc proRra.n, so ii 
would ink: a lot cf diligctt scnrcbing 
fn wnik il tun This cmld hr(lc«-c h^- 
OS follows. 

Joi;'t juit hive a If A$ = 
"Pajtsivord" Then line in ihc 
pragrtm. Rather, ho'd the password 
a<i a scrios of chanctcr mnnbcr.s 
wliich chc co.nputer chorks clcmeiv 
by clemcr.t, oomparins ihc Dun:bcri 
with the A5JC1I codes ol the cnk-rcd 
stiinK 

These need no! be held in ihc J;imc 
orJcr as llie piibsivorj. and nccc nut 
ev:n be in a sinKic place within th: 
program. Every,, sot, third valu: 
could be a dunimy, which ih; 
compulcr could iijnccc, ind >o on. U" 
you rr.akc it cinicult to wurl« oul tli.: 
^icisw^^id, fiuiti .111 CM) )>ii).ttiuii of 
ill; progrs.rn, you incicasi iissecjrit/ 
to a cirtain e<ier.t. 

MC GRAPHICS 

I I LiMvi; A 'tBK Spccti'um and 
have been le^rniitg machine- 
cede. .Most areaf of mac.iinc 
code arc well explained in books, 
hot I have found very litdc on 
movinK graplucs and sprites. 
Could ynu tell ms if there arc 
any books specifically dealing 
with graphirs? 

Piirkhitd.', 
I'iortfiatiiftoti. 

Al.THOi.'GH> At.AKK. I do not know of 
any books spccillcally ileal.ng with 



the iubi:ct, 1 suggfst die two which 
ire most likely to be of value to yau 
ifc Siipcnlurgt Ynur Sptctrum by 
Dav.d Webb (Melbourne Houie, 
i5.95) rnd Aiatiermi; Madiinf CfJe 
pri -sour S feci nan by Tony Baker 
{Initrface Pibli:aiKms,i;9.J5). Tdbc 
iiuere&ied to hear from any 
pub ishcrs vho have produced works 
dealing specificatly with this ^ca. 

QL PRINTER 

I \l present I have a /.X 
Spectrum, but 1 wil, be buying a 
QL shortly. To accompany the 
QL, I also intend (j buy a 
printer. The main purpose for 
this b t9 produce a quality 
printout, -inirahle for forriMt 
rcFort* at University. However, I 
wojid also like it to fac able to 
pri'duec graphics. Obvtoii9l>, t 
woald need a do: matrbi printer, 
and I KUtlier printers snch as the 
lirolhcr ht'44 and the Silver 
Reed BXD15 can produce a 
qtiality print very dost to daisy- 
wheel quality. However, I am not 
sure how versatile ihey are with 
regard to graphics, tlould u*cr- 
define graphics be printed, for 
instance? If nou what kind of 
gr£.phic3 cun they print. Alco, 
could they cope with snbtecis 
such as graphs? I intend to spend 
between i2Uti and £400. 
C J Hint, 
W<itt>yi (jardat Oiy. 

I HAVK i;sK» in Epson l**X80 exten- 
sively Tviil: m» OL and have hac no 
prohlent reproducing ary thing 
wliich ;ati be nclci wi;hin a program 
lint. Ko(c th:l oo tlic Ql. t)r'j|)<iict 
do not have the s>me im;M>riance as 
on the Spc.tniu). There if nobuit-in 
Basic tout nc for Ucniiiii^^ ycui uwii 
graphics, for iiisiuiice. A iT.achine- 
codc rC'Utinc is needed forthi;. Tierc 
is jIso no buih-iii lacUitV; hk: Copy, 
to dump he screen to the printer, 
aitlioucii '.licic are routines wuich 
will dc this. 

I often f nd it is better id put some- 
thing like Prlr.i CHRJ (141) witi in a 
lisiing: rather than just a pai- of 
qii.iie marks with an obicurc, liard- 
to-Jccipliei giiiffhic within it To get 
test output to the p.'inter from the 
QL, you reed to open the chinn^t tc 
the pr.nte.' — I generally use #3 — 
then freficc the material you want 
wi:h this channel number, as in Prim 
# 3, "Hello" 

!f program listings and strdghi 
fcTi 111 tpiii fo-ni the bulk of the work 
you'll be doing, alnu.'it any printer 
will do. You can buy a very good 
daisy-whc;! printer within yCiir price 
range. No:e that some printers do no- 
albw you to control .lie sjidih o.'the 
OUIpUl when Iblil^ a pmgiaui. 



which can he a major Jisadvatiia|,e 
when includng listings wit lin other 
material. If litis is ioipof lai t tc you, 
yiu should check this out before ycu 
dzcidc on a Tdrticulir machine 

TOO COMPLEX? 

B I have a program on my 
Commodore B4 fr>m one of your 
iwtii;s which !nrUul**<> <;«»v«»ral 
machine-cede routinea. I am 
s'jre it is typed in correctly. 
When it comes to a fpccific lir.c 
— tt,e same liae each time I try 
to run it — which includes SYS 
38t>00, the program goes wrong, 
and the message '^Formula tco 
complex" appears on the screen. 
The keyboard also lucks up. 
What is wrong? 
H/nrr Sitndut, 

Nortiay. 

Tuti ss'AOM.t. figpirr. rhe moehiive 
cade roeitir.c starting at address 
38600. As yuu pet in crroi message 
each lime liom this lire, it appears 
t.iat (herv is an error in the niachitK- 
oode. The error nj:ssa;c "I-'ormula 
tx) eomplo." i> tioi sigiiificatit, as 
nacfiinccoce erro-s often triggpr 
Lnre.ated Basic error n;essaees. 

Hr-wcTcr, the fact tha: ymi'vt goi a 
Basic error message suggets the err.->r 
i^ you: maciine-coJc pro>;ram 
nodilics something used by the Hajic 
pru);raiiL It )nu>-, br example, tu<e 
suiiullitiii; ulV tlic m.kK wilhgiil 
n:ptacin{ it. so tlii; Bisic program 
finds the wron(^ values when 
earr}ing out soinetbiiig ebewlKte m 
■he progran:. 

AID ON AID 

■ I own f. Vic-2'1 and an lOlO 
expansion bovrd, widi li Plu,^ 30 

16K Kam, a Commodore iK 
Ram, a ProgtanunerN \ld, and 
a Super Expander. >Vhen I do a 
SVS 28681 te enable -Jic Pro- 
grammer's Aid. nothing 
happens. It %vorli$ with the UK 
Ram on its ov/n, but when I add 
the other cartridges and try 
again, I get nothing. 1 wi>uld like 
lo kno\* if :t is possible to get il to 
work will* all "i»* carcridgee in it. 
.? Maori, 
Htih 

THt 8K CArimtKii- and tlu Pro- 
grannner's .Aid use mctnoty which 
overlaps so you canrot run them 
x»th at once, Vou should luve no 
irohlens with isinp, all the ot lers at 
■.he sanx: time, bu: the 1*A and the 
iK cannot be Uicd n once because of 
;hc mcnorr ov;rlap. 

SINCLAIR LATE! 

H Does any reader know how to 
get Microiri»c orders executed. 
I placed my order ci^hi weeks 
ago, and so far have received 
nothini;. Sinclair has not even 
replied to my t|uery. I am trying 
to contact die Office of Fair 
Tradirg to see if they can help. 
Hue there besti luy action from 
Ibis bcdy over Sinclair? 
Dt a C Swih, 
Beijasi. 



Sn!CL,\lR ui>i:;\i«:ii ha;, been ibi 
target of s;ver.)l !ir>proacl:es from thi 
Adv'crisir.g Standards .Avtlio'ity. 
mosth diK ic its inlainuus 28 day; 
delivery promise on Ql.'s, A 
spokesman fo: Sinclair lold me that, 
as far as ne Vncvf, na situation hac 
arlten wliicli meant tl-.e Offico of t'''.iir 
Tiading had liee.i brought into the 
quest i)ii, 

Accnrdiiig lu llic tc^uiJi, /Ou.' 
order was dcspaxhcd seven weeks 
from fhc date ofyotr odet. If you 
have not fccc;vc<l the product by the 
tiinc ihc letter i> publishec, let us 
know, and we'll send the bciy^ OTCr to 
sort it oui. 



CORRUPTION 

■ I typed ill a inAij^rtim from an 
earlier issue of your magazine 
for the Commodore (>4. I had 
some diUictitty keying it in, due I 
think to there being; over 80 
characters in some of the linc^. 
Hventually, I managed il, and for 
some time f.ftcr that 1 pl:<ycd the 
game quite riftrn. Then, ime da>. 
ai the end -if Load, "Load 
Krror*' (lashed up on the sereer.. 
On listing, the progTom trti>k*d 
complete. However, tlii game 
woiilkt not run, because after 
typing Run. parts of some lines 
— and all of some other lines — 
were deleted, or an error 
message was displayed, or the 
machine locked up, I cannot 
delete aor edit the o:TcndinK 
lines iKrcause when I press 
Return chc li.sting disappears, or 
cimply rAturnt :ie it wae, or the 
machine locks up. I have tried 
the tape on another <!omrnodore 
64, i:slng another rceortler, and 
the s;imc result occurs. How do I 
play tlie game, without .'ctyping 
the whole program. 
IreJ Slair, 
OteaJk iltilme, 
Chesfiire. 

l."Ni''OHr 'NATi-i V. IT «nnnd<> ns if 
yju have coiru|Xed your tape, either 
hy rerccordinij over pan of il, 
J;scr;>yiiig sjnic of ihc inrorm.tlion 
niagrctically, o: by siretcfiing, or 
othc.-wisc deforming the tape 
F*iys.cally. Short of using ;!ic "loid 
fix" oftiors available in .<!omc 
CKtcrdcd Basics for tie CBM-6<1, 
there is nothing you can do other 
than lypr in the program .-^air. 

I s jggest rhai, thii time, you maXc 
one or more security copies of ihc 
progam, which are kept on l tape 
vhich you do not t;eni.Tnlly iice, ••■o if 
)«ur worki.ig cop>' is eorrupitd, 
jx)u'll have nrothcr ;op>' of t^& 
program to all bad oi.. 

By the way, wu may have natic.-d 
en the Commodore 61 that programs 
which iicludc sprites, such as iTic 
cue you are talking about, tend to 
cause more problems ■vhcn loadl ig 
then", in thin non-sprite nrof.rams. 
This is because the ii.acliine slows 
cowo slightly lo handlp fhp pvira 
iaietrufit routines demandad by the 
sprites and this appears to aflcct the 

iqU4l.ty of ihc 54VC . 



YOU^ COMPUTER, FEBRUARY 1S85 123 



mmm ©? ras mm 



THE RING 
OF 

DARKNESS 
PART II 



At last the saga 
continues . . . 

The Guardian of Shedir 
is defeated, the Heli 
spawned hordes of the Evil 
Sage lie at boy. Now 
Rjngbo«iror, wielder of the 
Four Bright Rings, must 
face the greatest 
challenge: to return the 
Ring Of Darkness to its 
creators on the hidden 
planet Ringworld . . . 
And somewhere otths 
ends of time the forces of 
evil are preparing their 
revenge. 

After one year of 
development, Wlntersoft 
are proud to present the 
most sophisticated gome 
ever erected for the 
Dragon 32. Written 100% in 
madiine code, RETURN OF 
THE RING is on astounding 
multi program blend of 
superb high resolution 
colour graphics and 
advanced routinos that 
allow you to communicate 
with your computer In 
complete sentences. You 
willface challenge end 
excitement as you and 
your Ringworld 
companions travel a 
mysterious planet and 
brave the dongers of on 
amazing ihree- 
dimensional forest moon. 
An epic adventure 
unrivalled for its wealth of 
detail and diversity. 

May luck travel your 
path. 

Please note: RETURN OF 
THE RING is a complete 
adventure. You need not 
buy THE RING OF 
DARKNESS to play H. 



DEALERS PHONE 
01-3675720 





30 UPLANDS PARK ROAD, 

ENFKLD, MIDDLESEX, 

EN27PT 



ALSO AVAILABLE:- 
DRAGON 32 

Return of the Ring . 

The R ng of Dorkness 

Dragon Tiek 

SPEaRUM48K 

The R ng of Darkiesi . 

ORIC-1 48K 

The Ring of Darltpw** 

Oaerotion Gremlin 

PtICIS mCLUDI PtP, VAT, AND OUR IIFETIME 
GUAItANriE. 

SELECTiD TITLIS AVA1U8LE PROM 
UR0CRSRANCHE5OF, 



£9.95 

. Y. . £9.95 
C6.*5 



£9.93 

. . . £9.95 
£6.95 



SOFTmRSmJE. 



Software File gives you the opportunity to have your programs, 
ideas and discoveries published. We will accept contribuVtonc for 
any home conputer provided Ihey are submitted to Your Computer 
exclusively. Please double-check your programs and specify the 
memo7 they require before sending them, preferably on cassette. 
We pay betv/een £6 and £36 for contribut ons published. 



9950 PE« 0,D.'1cG=iP'P 1934 

995: iHtf 0= Pftp?P T- BnR:>EP ?•■ a.s 

9952 PEM LISf'-L.I?-!' &TfiRT-OC 

■505? IHPU' "FIRST ^IKF TO LIST 7"-'3iq»1 

9954 IHPLr ■■L(=l8r LINf^ TO LIST "^ "EHO 

a955 IF STftpr » EtO THEN PRIKT -START HW EtIO LIMES HIJ3T K DIFFEREMV = CLS 

CO TO 9352 
?95f LET PR0G=23635" t.fcr \IH<6~£}>:if 
9?17 OEF FN fl''X)=25iStPEEK CX+l)4FEEK X 
99?5e DEF FN ?• X^=PFFK 'X+l )+2;6tFEei' X 

■JQEIQ I FT PPO'aP'4 fl' PROf. * « 

9960 CLS • P?INT S|T 19 - 18. "PLEfi?E WAIT* 
$Si€: LET VftP5=Fht fl< VW?S ) 

996? PFM fin:> podpess of stbrt line 

996? LET LlN:m'C'=PPOG 

9964 IF LINE=^['D=*'FP? THEN a.S PRiHT "L:f« -;?Tnf;T.' p:Kr? tjf<r EXIST"- STOP 

9965 LET IJN-Hr^FH PU It-ERCD"* 
996« LET LIHHLOJsRJ Ff LINEFDD-t2 > 

99$' I- LIMLMDsSrflRT TI-FK^ LET STL!N-l.INEHO LET 3TLlHE«»Dl>3LINEtt'D' LET STl.im.E 

H=LINE.EN G:i TO '9?7\ 

^9Si L£T .INiftr)r>-LINEftr>r.+4+l JMELEN 

^S'f? G> TD 99';4 

997f* P"M -IN"; flDDfSS? OF FINISH LIN; 

997t 1 JT .INEi1fv>Bi.lNfflDr-t'4-'LrHELEN 

9972 I- LIMEPOt-Vf-P? THEN CL<^ PPtUT "L[t« ";EHD,-" XiES; K'T EXIST": 1T0? 

?973 LrT „if€Kc=Fi- paise*tpr>) 

?974 L=^T iH^I FH«FN Fr LINEflTO-fi > 

?97f5 I- JhCNCeEK- THES '.£T RUDLTM-^LIMPHn LET E•«>Lr^€RDC«LI^€f^D LET ENDLINI 

rH-LINSLfi-r CO TCi SPf& 

?975 L-T ..IMfRf^»-lINEfit>D*4-»LlHeLEM 

997' r.-H fi 9972 

3973 P^IMT 

iitf^ Kin NOW ofiiNT Limrf 

3983. INPLiT "LI<T 10 -ir.RFEM C«R PPIflTEP <?"»>? ",C» 

?9E:i as- 

9C1R? iPT r>FV»?i IF Qt»"P" OP 0»«-(>" THFM LET DE'.'eS 

39R-: FEM NOt. TEftL WITH PRTNTIHG OtflPftrrEP? , JtJ^PlHG mtP tlUCEP Ti>:(:m » MNPPIH 

TflB„E CHFPFICTFF?. 

9984 INP((T "I UE SPRriHC •» < l-SIMHE. 2Bf»OII8Lr ETC.' '/JP 

•<jg"; rpFfrr w-rA, iw ?.rn Q<-5rt.THEn(>r> • tr^' ?; 

993e FOP Ma^TLlMEPDC'+'t 10 FNfM HEftr**;'*EHXIM.EN 

9987 FF:firr *DF^'. IMt 1 rfH(?s »5Si^ N ^t»0 -^ Pi£K K-n OR PEB< H>3M- 

9988 IF FPFK Ho 14 THEt^J LE" N»N*? 

9989 IF PEE^ Nal3 THEN FOP I'i TO SP: PRUIT HffV- MEXI '.■ KXlflt nwi; i«; 2iHr< 
Et(N+l )i rfie 5; ' LET H=N*i 

9991? r«XT M 
C'C-^I PRINT «OEV 

999? -srrop 

9995 SAVE "ILI$1" M'lE •?'''» 



List enhance 



C D McGarr, 

Harbome, 

Birmingham. 



FITTTnrT 

1" 



TFTTTfTTTT 







Thls PROGRAiV. afow's yi>u lo prill', a selected 
rtnge of Basic line> lo either screen or priniL-r. 
It simulates the facility List/LLisl — line 
nam>cr to iinc number availab.e en other 
computtrs. 

Tic program will run on 16K and 48K 
Speanims Jiid is Microdrive c^m^utible. To 
ujc it, type: 

^UN 0050 

The program sliould be .Merged '.vith an 
existing program, or kiaJcd before a session. 
Eoth start and ;nd lines should i:xist; a 
message will be prin-cd if cither is absent. A 
mcjiagc will also be printed if (he s:art and 
end lines are rot JifTcrciU. 

To alter the :olourof the iisttd l.nc number 
alter line 5985, which is rod at present, To 
change he colour of the Basic within the line 
alter line 9987 — blue «l prvacnt. 



Qwakers 

Christopher Roche, 
Suttor Coiafield, 
West Midlands. 




QwAKKR.s .s a fairground shooting gane. Ycu 
nust sioct all :lie targets wtih a United 
uunibet of shots within the time limit. There 
arc our levels of ditriculty and four diffirent 
screjns 

Controls are: Z — lefiv X — right; space bar 
-rre. 

Td load Qwakers, i^pe in lisiing 1 and, 
without running it, save it to tape. Then key 
in tkiit'.g 3 — again <vithou: running it — and 
<ave it. New rewind the tape end load as if it 
wcr: a sinjle program. 



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PRIHT 



(continued on next page) 



YOUR COMPUTEP, FEBRJARY 1985 125 



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prT«> n.U7,i4S.j«.^3», i«4.ju,.»4,l^,l9,t,2«rSf>23S. 192.3.29S. l«? 

ftfTP C 0,«.0,».0.«.0.«>.0.(.9 ?.9.o.«.«<e 

ptn 

D'rw.O.e.d.O.e.a *>.0 0.0-e-3-O.0.7,l2«,«.>,l«2,«, 127.I9M3S.1*''.?55.222 
P*Tr» 1$, 127, 1«0.}«.25<..I$4, 39,234. 129. IS. l.?40.3.2SS 192.3. 2»9. 1!i2 
UMH «.V>0>9.*.0 (.0 *.A.*,A.>.^,0,e,9,o 

I«iTA0,19. I$2.t. JO 192 «,«.. !»!.«. 123. 192.0. 247. lis.:, 2»e.t 239 0,3.222 
l»Tl40,7.If«.9 19.;20.».«.;49.).l«.232.O.]«.2eS.O.l«.)«e.«.l<> 224 0, li 

t^t'W.e.O 9,9.0. <*.«.«0.i!i e..J.8.a7-120.0.9.1<'2.t:,U.MSJ,135, 12T,25S.2« 
tfl<> }5.!i7a«!, )*,?». 194. 'j«.2;4. 120.13. 1.24^.3,293 192.3.293, 1»2 

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RBI 

BflTfi 0.O.BO.i*.rt.<».0 0.127. 01. 2S?,U2. 3.2*5.224.^233, £40 



2«30 
2«4« 
2«» 

2070 
29W 
2»«0 
29«0 

iM» 

23:->) 

294* 

24«« 

2?<* 

a»7« 

29M 
2»* 



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'.aw.:*?.! ;;i3.|?9^C.12C.O.O c.o.co.t.o 



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MrA2S3.T%. !.i»9 <>'.A.t;?4.e.o ie3. .0.100.3. o.ios.o. 3.<«s i?ji,e,«.o,e o.ft 

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rH*),*,0,0,i:4,0.0.2S4,0."..l»7,Kt.3.1-. I2S- 3,1, 120,7. «». 192,7, !7,19£ 7 

I<iT<«?5, life. I 199 0.0.124,9,0 108. ,9, 198, 2.3. 1««,e, 3 239,128.0.0,0.0.0,0 

X'lAO. ».n.<'. A <«.4.0, 9.0.00 

P£' 

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M'TA795.;%>I 1<^.0.0.!24.0.0 lOS. ,0,lO«.».0.1i9$.0,:j,^.^.U«,0. 0.9,0 9,0 

X'TAo. 9,0 0,0 0.0.0. o.o.eo 

M^rAA.>.3.(t,i;<. $,0.214.0.1 197.C,3.1».l2»iS.l, I5«.7.fi<<. («tP,7. 17.I9P 7 
M«rA25;,l92,l.!99.«.u.li::4,y ei0«..0IO<S.3.O.!0e.e.3.2S9.ia8.0,e,6. 0.0,9 

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M-W5;. )». I i>» 4 0,l24.O 0. 100 ,0. I««,>,0.!«0.0.3,£3;'.1£0.0.0,0.0.0.« 

1.^-PO.) 0-4 (v.it f<.i;*.n,*<.n M 



Submarine 

London SEW. 



yi^if^ 



mMMM 



The PEOGR.VA is an adaptation of an old 
arcadi; i;Hme in wWch the plav-T — in a sub-- 
marine — has to sink is maiiy ships as possible 
in the t.Tnc all>\vcd while avoiding the inincb 
dropped by the ships. 

The program aims ;o shovi' someof'lhe vi:r>' 
advanced features oC the .\rastrad and has been 
documented, witliJii tlic progran, in Older that 



Rc:ieral principles tan be Jcer and to allow for 
iinpna'cnents or modificitions. 

Tht prugram jsei the very versatile in:errupi 
commancs togcrhci w.ili ilic cx'.ciisivc sound 
po>sibilii:cs of :his in:ich.nc induding multi- 
channel tunis and special sound effects, e.^. a 
"whooslj ' as the torpedo is fired, explosions 
etc., and a fairly reguhr ionsr bleep which is 
also iiiici(u|X diivci. 

The Ra.iie .s uritiL-n Cir use with a QuLckshot 
II Joysiick hut cojld ea>ilv be acapied for 
keybo.ird control by altering hues 2]0-2?0. All 
rem lines — siartii^ v/ith either R^m or " — 



ma> be removed but arc usefiil fhi sMing hnw 
the program i> built up. 

Rules arc not included in ihe program but are 
ver)' siraifjhiforward. The object of The gtmeis 
to sinfc as many ships is possible within ihe 
given time 'l"o do this you move the c-irsnr Iffr 
or r.ghl in order lo line it up with [he finishing 
point ot'exh lorpedo. The lorpedos s;art from 
ihe [lose of the sub which remiin^ bottom 
centre of screen. 

Wheu tlfc first button is pressed a si:iiplc trig 
formula nr.oves the torpedo gradually to tJie 
position of the cursor and hope.ull)' hits a ship. 



126 YDUR COMFUTER, FEBRUARY 1935 



sofnimEfM. 



For fa:h ship hit you score 50 points Tlic 
sliips drop mint's ni ranHorn wiich hoiiie-in on 
the si3b. These may be stopped by a direct nit 
from a torpedo or may very occasionally stop of 
che;r own free \vi;i in wMch case ;i orpedo fired 
at ihei.i will have teen a waste .if time. I" a 
mine hits ific siih, you lost a life. 

I" ycu lose five lives the ganie ;nds. Lastly, 
right at the beginning fou arc asked to input 
the lev.'l ot di.ticultv. T.iis figure sets the spied 
at which ihe Every command is called and so 
affects rhi* sprert of the <hips across i.\t scre;n. 
Program notes and main vanab!es. 
Lines: 



15-90 Sei level of dif ticu ty. 

100 SciG up mail variobles — 

see below. 

110 Jumps lo initia screen, array 

for note 'recuericy and 
duration, and p ays tune. 

130 Useful wien typing in 

program. Defin3S small Entor 
key tc list ir black on while. 

150 Sets up more variables. 

160 JuTips to main screen, 

wmacv/s, volume and tone 
en/elopes aid JDG 
definitions. 



170-180 
190-670 
680-1010 



1020-1360 
130017-0 

1750 22 



Interrupt commands. 

Main loop. 

Inlerruot routine to move 

ship. Also random mini 

ocneration: test for mine-hit 

etc. 

Main screen, windows etc. 

^rimar/ screen, music otc. 

rnc of game routines. 



Variables. 

tim = amount of tirre allowed. Initially 

too — fcLiuul 2V/ tnins. 

Lev = speed of interrupt routine — I to 

5. 



•«MM»4 AVOID6 COR 



10 ' •##•*••!■««« c. e.EDWflRDES 1984 *•••••••■♦♦«»•♦• 

IS MODE Bi INK 0,1:IW 1.26 

2U tULJAlb 1,V 

30 PRINT"PL£ASE ENTER LEVELi- (1-H 

ftRD: 5-EASY) " 

te LOCATE 1,20 

50 INPUT lev 

60 IF l«v<l DR lev>S THEN EOTO 7B ELSE BDTO li& 

7B CLSilHTATF A, I 7sPRlNT"TRY AtSAIN": CHR*t7> 

ae ^OR n"l TO lSfle:tN£XT 1 

90 SUN 

100 BC«0:tiin=ie0:l>'5 

11,0 GOSUB 1420 

120 MODE 1 

130 KEY l3<?,"nod» Ittorder 13: ink 9, 13: ink l,0:paper 

■.pen l!li■t'■■^CHR»<13> 

LSB X - 1 1 x«-l 0: ox -320: oy=28: ymi nB»272> f i rad=0:mi r«-B 

160 GOSUB 1050: REM »••*♦♦ SET UP SCR 

EEN tie •««*•• 

170 EVERV lev+10,3 GOSUB 690 

IBe EVER/ 75,2 GOSUB 970 

17B D:: rem 

UPTING SCREEN ••»*♦■• 

200 REM •••«•» HOVE SIGHTS & C 

hIECK FOR VALID FJRE •»*•»• 

2je x*-Ka-<JO/<0!>=>e>+(JCY(0)«4) 

22e IF JOY(0)>=16 AND fired-© THEN GOSUB 1 J28«'f ir»d-l 

23e IF JOY»0><16 AND fired»0 THEN 60TQ 610 

24lf oy"oy+J6 

2Se px-295-(o/-l6)*( <3x-x«2)/272> 

269 PLOT r» tOy 

278 TAG 

2Be PRINT" "tCHP*(231); ' "; 

290 TAGCFF 

300 Kbn ••»«•« MINE HIT »•■»♦»• 

310 1"=^ px>»X(nine+8 OR p>'<=><mine-B AND OY>'^mine*8 OR o 

y<=yinine-8 ThCN GOTO 400 

33B nave px,oy 

340 PRIhT" ■'; 

350 MOVE p%,oy-ti, 

360 PRINT" "; 

370 TAQOFF 

r^nO fir»d-e:ay=28 

390 yiiiirie=272 

400 IF oy<2SS THEN QCTO 530 

410 • 

420 ' 

43fl ■ 

440 REN 



•«««^*«» SHIP HIT *»4*«« 



4Se ' 

460 ' 

470 IF px>=(x-4:»16 AND px<=:x+2)<il6 ThCN SOUND 1.508, 

163,e,2,l ,lS:rOR n-1 TO SeiLOCATE M,<?tPRINT shiphit-^iN 

EXT niLOCATE k,9iPRINT x-1 : BC=sc+50:PRINTttl , "SCO 

RE<'";sc; 

IQd ' 

490 ' 

50B REM «*•««* TORPEOO OFF S-REEN »**• 

»« 

51B • 

528 ' 

530 IF oy>-26S "HEN LOCATE «]NT(p«/l6> >*2,25-< INT «oy/l 

6) ' sPRINT" ":LOCATE(INI <pK/lb) »-H,>r6-lJNI (oy/l6) J:PRI 

NT' ':fired=0:oy=2B: LOCATE 2a, 25: PRINT i:HR*(20<> ; ZH 

R*<205); 

54e px = 2'?3-(oy-i6)«< lax-xs2>/27Z) 

550 Gy2=ay-16 

560 r-OVE pK-32,oy2 

S78 TAG 

580 FRIMT" ■'; 

590 TA60FF 

/.eia LOCATE 20.25:PRIKT CHR* (204) ; CHR* <205> ; 

610 IF xs<l THEN xs>] 

622 IF xs>3e THEN Ka-3B 

632 LOCATE K9,10 



♦••»«« SHIP MOVE ROUT 



640 PAPER 

630 PRINT" "t C^R^{244)^" " 

660 CI 

6/0 GOTO 190 

600 REM 

INC **•»*« 

690 LOCATE x,9 

7e0 PRI^T- ";CW^*(240);CHn*<24U;CHR«(242>|CHR*<243> 

710 IF ymtne=272 THEN GOSUB 1350 

720 IF ymine<272 THEN GOTO 73B ELSE IF INr{RNI>»10)-H<> 

1 THEN 30T0 940 

730 ymJne"ymin»-6 

740 xmi f>f»300- ( (320-:<m;> /240) ♦ <ym;nB-32) 

750 :f ymine>2S THEN 6CT0 873 

760 SOUND 1,200,100,7,0,0,10 

770 FOR n-1 TO 10 

780 LOWTE 19,25»PRIMT sub« 

790 LOCATE 20,25:PRI>»T subS 

BUU LOCftTE 2l,23«PRINT aulj* 

810 LOCATE 23,25;PRINT subs 

820 LOCATE 19,25: PRINT «ub* 

OZa NFXT i> 

840 l=-l-l:PRINT#3,"LIVES"il 

850 IF 1-e THEN GOTO 1790 

860 /Ri>nB-272:GOT0 940 

670 10VE xmirte.ymtna 

8B0 TAG 

890 »R1NT* • "i 

980 IF yniln«>"257 THEN bUlU VJB 

910 NOVE <mine.yinin*^14 

920 PR J NT" "; 
VSO TAOOFF 
• 940 x«y + l 

950 IF x-36 THEN -OCATE 36,9:PRINT" "tK-l 

760 RCTUrtN 

970 SOUND 1,55,75,8,3,2,0 

9Q0 tio»tim-l 

990 PRINT ttS,"TIME-' ;tifn 

1000 IF tim»a THEN BOTG 2020 

1310 RETURN 

1320 REM ••*••• VOL. & TONE EN 

ViLCPES : INK COLOURS 3ET i 

SCREEN li WINDOWS DRAWN 

: U.D.G'S DEFINED »•«**• 

1030 • 

1040 ' 

laSB ENV 1,5,3,1,1,8,18,30,-1,10 

ItdoU bt4V 2,11,-1,23 

1370 EMV 3,15,-1,5 

1380 ENT 1,9,49,5,9,-18,15 

la^e CUT 2,2,2,3,2,-2,3 

1102 BORDER 

11 le INK 0,1: INK 1,26: INK 2,lli INK 3,6 

U2P FOR n=7 Tn H 

1130 LOCATE l,n 

11 4* PAPER 2 

1150 PRINT- 

1168 NEXT n 

1170 UINEOW Hl,l,ll,l,liPAPER ttl.3 

1180 MINCOM «2, 15,24, 1,1 :PAPER #2,3 

1190 WINCOW 413,31,40, 1, 1: PAPER «3,3 

1200 PRlhT#l,"3CCRE-";sc:PRINT »2, "Tlt'E-" » timsPRINT « 

,"L]VE3=";1 

1:^:11* ijrntUL 240, e,e,e,3i ,4,233, i27, 63 

1220 S^MtOL 241,2,2,15,63,63,255.255,255 

1230 SfMBOL 242,0,0,192,255,255,255,255,255 

1248 SvneOL ?43,e, a, 0,248, 254, 252, 218, 248 

1250 SYMBOL 245,0,0,86, 170, 3, (!, 0,0 

1260 SYMBOL 246,17,59,50.30,31,15,7,3 

1270 SVMeOU 247, j:jB,6e,?.4,R, 1A,7Rf!,7f5?i 

128D SYMBOL 248,68,76,30.60,120,240,224,192 

12<70 shiphi-.«-CHR«(246)-»CHR*(247i+CHR'»(24e) + " " 

1300 sub*-" "■H;HR«t204>-tCHR«(2a5'+" " 

1310 RETURN 

1320 xb2=(xs*16) 

(conVnued on next page) 



YOUFt COMPUTER. rCDnLARr 1905 127 



sonwtasmM. 



****m HUSIC »««•« 



(cant'Dtietii 'rom prevous page} 

1330 SOUND l,2ea,99,l5,l^a,9 

1340 RETURN 

13Sa Km'2^ <><»t&] 

1360 RETURN 

1370 • 

1380 ' 

1290 REM 

1400 ' 

1410 ' 

1420 MODE a 

1430 BORDER 11 ,16 

1440 lo::ate 7,6:PRrNr" you have approx. 

14SU h-KINT 

1460 L0::ATE S, 10:PRINT; <tiin«K5) ; 'seconds' 

1470 PRINT 

i-^aa PRINT 

1490 PRINT" TO SINK THE 

1500 PRTN1 

l<3l(B PRINT 

1S20 PRINT" CONVOY 

1S30 DIM notesl(25) 

1540 DIM nnti>«;7(7Sl 

1550 DIM durl (25> 

1560 DIH elur2(25> 

1570 FOR .^-=1 TO 25 

1380 READ notesl <«> 

1590 READ diir 1 (a J 

1600 NEXT a 

1610 FD^ a-1 TO 23 

1620 RE4D notes2<a> 
1630 REi^D dijr2(a) 

1&10 NEXT « 

l&SO DATA 379, 50, «, 2, 379, 23, 358, 25, 0,2, 358, 23, 8, 25, 379 

, 25, 358,25, 379, 23, 426, 23, ^7B, 25, 506, 75, 426, 25, 319, SB, 3 

SR, f! tl. :?79, 1 2. S, 478, 12. S, 350,t'-.'.S,<26, 12, S, 319,23,3=6,2 

S,37«»,59,426,SB,47B,75 

1660 DATA 638,75,478,25,8,2,478,23,0,2,470,23,0,25,47 

8, 25, 569. 25, 470, 25, 568 ,25, 479, 25, 426, 7?, SflA, 7?:, 47fl. 50. 

506,50,636,12.5,758, 12.5,506,12.3,638, 12.5,478,25,368, 

25,478,50,638,50,758,75 

1670 FOR a" I TO 25 

1680 SOUNC 17,nDt*sl(a>,durl<a) 

1690 SOUNC 10,notM2ta>,dur2<a> 

1700 NEiCT a 

t/lO RETUPN 

1720 ' 

1730 ' 

1 748 ' 



1750 REM 



176a 
1770 
1780 
1790 
1800 
1B10 
tR70 
1830 
1B40 
IBSe 
1860 
1870 
1880 
1890 
1900 
1910 
1920 
1930 
1940 
l9Se 
1960 
1970 
I9H0 
199e 
2000 
2010 
2020 
2030 
2040 
2030 
2060 
2070 
zess 
2090 

2iee 

2110 
2120 
3133 
2143 
2153 
2163 
2173 
2183 
2193 
2200 
2zie 



*»■•*« ENC OF GAHE ROUTINES **■** 



FOR n-1 TO 3eO0:KlCXT nsHODE 

LOCATE IB, 26 1 PRINT" BffD LUCK 

PRINT 

PR TNT" VnJI WFI^ DESTROYED " 

PRINT 

PR INT - 

PRINT 

PRINT" 

PRINT 

PRINT 

PRINT" 

PRINT 

PRINT 

PRINT" 

PRINT 

PRINT 

PRINT" 

PRINT 

P«INT 

GOSUB 21QB 

STOP 



BY MINES 



BUT YOU SCORED 



•jsc 



POINTS 



WANT ANOTHER OO 



YOUR TIME RAN OUT 



DIiHODE 

LOCATE 10,5:PRIN' 

PRINT 

PRINT 

PRINT" BUT YOU SCORED 

PRINT 

LOCATE 8.14:KH1N ?«c 

PRINT 

PRINT 

PRIWT" POINTC 

PRINT 

PRINT 

PRINT" UANr flNOTHF^ fin 

PRINT 

PRINT" (y/n) 

G05UB 2190 

STOP 

*««:nkey*s if a*-* 

IF a«-"y' THEN RUN ELSE IF ■♦-"n" 
GOTO 2198 



THEN GOTO 2198 



THEN RETURN 



The Mine 

F Clancy, 
Manchester 




Fiji J is'struotions on playnj- The .Vlir.c 
are incl.idcJ in the ptogtum 'I'o save i copy of 
The Mine, firM lypc :n on line I a Rem 



Maicnicni concaining at '.cast (i70 characters 
Nsxt type in t;tc stantiatd hex loader given 
T.icn run iiis prC'Cram and rype n the \u'\ 
code giv;n .n listi.ig 2. Thtn delete the hex 
lojder, leaving line 1 intact. 

I'inally enter the rest cf the Basic progranr 
given ir listing 3 and save the finished 
ptY}gram by cntcrinE Goto 770. 



Listing 1. r/»e hex loadet. 



99 F:Crt rit> LUHJ*"!!- 
iOC PRIMT ■ 5T0C1T ADDRESS" 
110 INPUT 5 

12v PRlr^r '-INI5M flDDF.EoS 
lOCi INPUT f 

14.13 fOP. H=5 TO F STEP S 
150 LE' T=0 
160 P^^INT N, •• - " ; 
170 IMPIJT flj 

150 parr-iT p.s. 
13D ir-JPUr TGT 

PinCi 5= TNT TitT 

510 1.5T Z=G 

5S0 =0R !'.=a TO L£H fi$ 

53© LET -Z^iCOC-E flS'K) 
:■= fl« {^4.1^ -S3 

240 i-ET -^sT+C 

£?0 POKE t-i-tl -C 

£&o le:t Z=2+i 

;1-"'S NEXT |> 

£50 IF TOT=T THEN GOTO 310 

-=93 PRIM" "ERROR - PLEASE INPUT 

:os 5CTO ISO 

?1? KE<T U 



Listing 2. 

15519 - 

15527 - 

15535 - 

ii=,<;<Lr* - 

15551 - 

16559 - 

1656? - 

16-S75 - 

16 552 - 



5fl2iCJ-01 138001922 
FE 7F 1 1SB0Q 1 9S2CC 
7F3E003£F£7F3£C3 
7FppnC.:.(3L15SO019 
22C47.=-3EFPIoSC67F 
£10C0Ci2£C77FS(=lFE 
7F3f26i0FEDF2Q0o 
5fl2= 1 CFEF7£OOa.CB 
3H2rAOFEEF£01?3R 



:55rl - ^aaOFE^TSeeHdJll - 65S 

!J^=;3Q _ 2130F£=F2OO3P7ED - 965 

16637 - 52=EC-=(?01192£Ffl - 901 

16615 - 7.='7EFECeS319F£SS - 962 

16623 - 25iSFE1720OEetO5 - 392 

16631 r:l = ^?F;4.CDEE4.elO - 924 

16639 - 36?RFE7=22FR7F2P - S;a 

8 1664.7 - Fe7F0e0i?2AFfi7F36 - 9<LS 

16655 - i522rE7F3EB'-1121 - 7iS 

1S652^ - i«e3FlCF!7rfl?CP5S&E - iz*r 

16671 - 204i=i:5E5ft7Et-5SBE - 1636 

16679 - 2e3i=i:-60Ol?363dA7 - 354 

166S7 - ED521cFeElE53PFE - iC-iS 

1C&95 - 7riC'c.e.>H-:i=ifr /r-BU - y^e 

,_^„ 1670S - 201O135?F=7r 7EFE - 3=8 

i^ip.t ^. 15711 - O0ate5£l£2FE7FC9 - SS6 

£S>->iB + ^L 1S719 - 3ei5E1197EF£002S - 74S 

ID ■.'£'-' - tfDttl:i£S02130D3E - 422 

16735 - 5665^6 1'OFEoC-FEI' 4. - 815 

16743 - 20F71cS73E34112i - 6SO 

16751 - 3©?aFF"= = =CTPr,S£ - 115S 

16759 - eE£i3G4:r.^Ei5F6El - ll?c 

16767 - £2CMTF2ftFE7-1121 - 336 

167'S - 0e«^"^EL'523EOOEE20 - 773 

lB7ft- - 1iJ?.BFPTFFE05i:006 - 7^-- 

15791 - 19.S6e021C67F46CD - ^ 12 

15799 - E54.2!:5£C-5B0C4e2!^ - 3-S 

15S07 - FE-FC7ECS2112100 - 917 

1531S - 3EFFgDeZ3C50FBFe - 1£49 

330 15S23 - l43oi5157DFE053S - 565 

752 15631 - 22FE2i?3ei£2RC77F - ^SO 

S53 15539 - 3E£EEE2ol55h.34iC - E3a 

s^s _=84-r - icrrzcsAicceFs^c- - le^s 

1044 1565S - 4BeC4e2i7gCSe'519 - 343 

659 15362. - 2£<?7''F2^.C~7F7EFE - 1136 

SO* 158^1 - 2E2ai71121Oe35C;0 - 205 

rse i:-o^9 - i9'EPC43£ce;3e=E - s&j. 

765 15337 - 29FEeei2?C~ : =2ES2 - 62E 



16395 
16903 

16511 

-e927 

16933 
16943 

■I F.Qf.l 

16955 
16357 
1697= 
160S3 
13991 
15993 
1-^.07 

i^osi 
irc3? 

1704.- 
17055 
170SC 
1707; 
1707* 
173S7 
17095 
1~103 
l.-:^il 
17119 
17127 
17135 
17143 
17151 
1715? 
1716- 
17175 



Listing 3. 



';77F31£i00^PC:7F - •'•33 

£5ED560L40'^-ir'S2 - Lll^ 

3eFF3C-7Ef:42?0Pfl - L14S 

^5452RF£7FP7F-> = P - SS' 

ese60CirFPi4qrED - 'SF 

4a33r&0r4S4F£17B - 669 

e83SC.2S3CEo30ei - 5 78 

a37=='Eai2iei:acElS - '72 

:Sl"lSC'7F793fill - 750 

2103FS:"^Cil9='133 - 64? 

C3fl-CC'5 = ~EF£.S£0 - 92S 

Q5^B0B2ccc7=:-&Qo see 

C9r50a2-rC3£PCC"F - :?-^l 

E52-CC"r3630ei:6 - 93? 

05£?C0~F3^C3?FfE - 394 

Gi:OC;C>7FFE3C-i-j4r - T;3 ? 

21C5TF7£3S=E03Cff - 991 

C>60='25C430-P:5:-7 - 652 

230:401 iBEoei^oe - aeiz 

■■r3aC&7-3C'6.E2S - S5d 

e43eFftl304=Ei2C4 - 603 

7F7ECB7=2e35Cve87 - 759 

001Si3;i3633^O:'72A - 357 

CC~F3E3O053C:0FE - 357 

3OrE175'C0£56eEFE - 319 

y«)il.'r ii:HOC4-Oil3E - S02 

CIO190*O73£3C£B1O - ISl 

r5C3B3-i-i33E26i3£i:l - 533 

213c4u3 4BE2G873c - Bfi-=. 

lC2e0';B920.= ElCi£E - 799 

EC'5B3C4321lfia019 - <13S 

118Sie£S31O50OED - 639 

8OrH7Ff>.ai,^«:ftr.S0El - 7SS 
C5 - £01 



13 LET ft=C 

=0 FOR .1 = 1651-;- TO 16S1S 

3i3 POKE H,2S 

40 M£;":T M 

Se POKE 17100 140 

50 LET 0=0 

70 PfTINT AT (>; 1, ",-!IGr- 300000 

SCORE 000i*0e" 
30 PRINT ^ V*.11-LES 3TK3 ^M 

SO FOP F = l T-; 3 

130 PRINT != -T . , 14; '^^^fc,- ;T=B 
13: 



128 YOUR COMPUTER. FEBRUARY 1985 



soFm/a^Fn£. 



\ -10 JpT tJT •• 
12Q PRINT " 
1Z2 PRINT ■• 



i.BiKF«IFFr 



I eofioM'illUHMi >li. 



FKINT " t 



15© PRINT 



IBS' PRINT 

'los 

re f*llNT 






180 PRINT 



190 PRINT 

200 PRINT"' 
2^« =RINT •■ 






^■ 



SflD"^ 



££© PRINT 



,1 

r'i~ ■' 



JXe PRINT 



KWWW .'hisses 



320 FCR H=a T3 SC 

330 NEXT n 

24.0 PFINT PT 10,13; 

350 FCR H=l T2 2 

360 PPINT ^T -4 .2; 

G70 FCR y.-i TD S 

£80 NEXT X 

390 PRINT fiT '<,?;•■: 

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•llO PPINT ftT £,2;"BB";TRe 2: "I, 
^•• 

420 RPND USR 16S19 

430 LET BsPEEK 32766-256*PeEK, 3 
2767 

44 e LET C=PEEK B 

450 IF C-. -e "f"riEH GOTO 500 

460 LET ^=£•■^i 

470 IF PEEK 17160 >50 THEN PCKE 
17100, r^EK ITISO-IQ 

430 FFir-JT «T lO 10: "UELL PONE'. 
AT 12.?;"<'0U URUE COMPLETSD LE^ = 
L ■■:& 

490 GCTo sse 

SCO FOR ■■1=1 TC 30 

:£S THEN POKE 5, 



B:12.e TMEN POKE B 



11, ■•LI'.ESc-;^- 
TC''.' STEP -1 

N,2; •••^•• 

550 FOP K-'. TO 5 

v,uo Nt aJ X 

600 PPIMT HT N,2;" 

ei0 NEXT N 

620 If P=E^ &=© TMEN 6CTO a«0 

640 LET E=0 

650 LET S=:^00O 

&60 FOR N=l65i4 TC ISSlc 



5 73 LET £=E+C'.?EEK M-2Si»-G) 

Oa» LET S:G/ii£i 

69D NEXr H 

703 IF E>fi THEN LET fl=E 

713 =RINT AT 12,7; "flNOT^EP GR:i£ 

T IV 'D ■' i 

723 PRI'iT PT ■' -^ ■]- • "fTlflHWII'1'l 

733 PRI>iT fiT 152,11; "GfiME O'JEP 

743 IF XNKEVJ=-V- THEN GOTO a 3 

^C3 IF INKEVS . : •■:;■■ -HEK 50T0 7£ 



■^eS HE'J 

772 iH'.'E 'THE HH-Q 

7S3 Ti'^KE I £ il- 1 = .J 
'9 



MT 




THE HIHE 



SIO 


IF PiE^ 


c 


/ 


^20 


IF PEEK 


1-12S 




S30 


NEX7 N 


540 


PRINT PT 


S50 


=f>INT mT 


S60 


FOR ^J=£ 


£70 


=RINT ftT 



'RB 

303 PRINT 
RM OLD 

VST 
JRH^NDi 

5P?!C£=rfIP 
2BLE.V0U 

£1© PRINT 
OR ERCM 

LING ROCKS 
IJTl I i-RII'H 
820 PRIWT 
UMO CHRSE5 
CU IF HE 

; TO MOVE. 

830 ?Rr.-;T 

flf'Ti' KEY TO 



-Oli Hfi'..'E LfiKOEO ^T 

orPMONO niNE.vo'j r. 

COl-LS-T fi!_L FI!.:E C 
AMD PErUPN 70 \OJP 
M-5 QUICKLY A5 P'J5i 

GET -IFTt POIN-S F 
DrPHaND •IOL-ECTHj. 
yC'U -iUST P.i.'OlO F^L 
PMD iiPHMERS UHICH 

VOU.RND THE GUPP:' 
YOU. HE U3LL KILL 
CrtTCHES VOL'. 
'Jie THS CUR30P Kf- 



PLR 



-pe -31; 



euMiliM^jM 



M 



PPtL^i- 



04C IP IN: 
3S0 CL3 
860 RUN 



THEN GOTO i-t^ 



Extra colours. Listing 1. 

laREM EXTRA COLOURS 
2dREri (C) by Rising Sun 
3aREn Electron branch 

50VDU23 , 224 , ««AA , &S!=i , X-AA , K^fi , Rr AA , AfSfi , fcA A , S,S5 , 71^ , 77!5 , 
255,255,255,235,23S,255,255,255:Dlt1col*<7) 

6anu5C=l 

70IFLJ'.=1234 6OTO90ELSEL7.= 1234: OSCLl "LOAD" " ' " ■'+STR$^ 
(TOP-2) 
SeSEND 

90PROCas5GmblB:HODEl:VDU19,l,0;0;19,2,0;0; 
100CDLDIJR1 : COLQURlSes «node7.= l : ar aphi C5X=-1 
1 10DATAbl ack , red , green ,yel 1 ow , bl ue , maqent a , cyan , whi t 

B 

120PUK17.=0IU/:KtttUcol»( JX):NEXT 

130PRINT STR1N6*(80," ") STRING* (40. CHR$224>STRI 

NG*(80,CHR-t:225) 

1 40COLOUR3 : COLOUR 1 28 

150VDU5:eCOL0,0:PROCDPRINT (2,8, "Hello") ;GCOL0,3: PROC 
DPRINT(22,a,"Hello") : VDU4 

160F0RC 17.=0TO7 : F0Rc27.=c 1 7.T07 

170PRINTT<=iB(0,13) "Nufnber " ; nu^TAD i0, 14) col*(cl7.) " mi 
xed with "cd1*(c27.)' . 

180VDU19,l,cl7.;0; 19,2,c27.;0; 

190gety.=6ET 

200nu->(=»nu7.+ 1 : NEXT : NEX T 

210REFEAT:PROCcol (KND(/) ^KNDC/) ,RND(7) ,RND (7) ) ; UNTIL 
F«_SE:END 

22aDEFPROCcol <Ay.,B7.,CX,DZ) 

230CLS : PR INT ' A7. , B% , C7. , DX ' 

240VDU19,0,A7.;0; 19, 1 ,B7.;0; 19,2,C7.;0f 19,3,D7.;0; 

250FOR 1 7.=0TO3 : FOR J7.=0TO3 : FaRKr.=0TO3 : COLOUR 1 7. : COLOUR < 
1 28+K7. > : VDU224 , 224 , 224 , 224 : WEX T : PR I NT : NEXT : ^JEXT: gBt7.=G 
ETsENDPRQC 

Ex'ra colours. Ust'ng 2. 
3000 1 DEFPROCassemb 1 e 
30002DIKQ7.200 
30003FOR 1 7.=0TO2STEP2 
300B4P7.=Q7. 
30005 COPT 17- 
30006. de^l EQUD 
30007. def 2 EQUD 

(oontinjeo on nexf page) 



Extra colours 



ro/T7 Griffejoer. 
France. 



I 



Thf. iiFMONsritviiON piogram, listir.g 1, 
shows how vol c< n osc 10 cwlours out of ^6 on 
your Electron or BBC Micro in fovr calour 
moucs and three cut of 35 in wo colour ii-wdts. 
Th«i program docKn*' work in MoJcs 2 aiid 5. 

These colours can only be used as back- 
ground colour, by filling a part of ihc screen 
with C'HRS224, ;lic iwo colours :o be mbced 
beirg respect ivcl)' the mh- ii:id hackijiound 
colours. Whe.n sou prim any texc over tie 
colcured surface — in graphics mode aftL-r 
VDL'5 — this text will be practically ur.read- 
able. 'f i;(t s wiiy the second ])rfy:ratti is used. Ii 
enables you to print double-width characters. 
'.Vlijti ihesi £112 printed ever q coloured surface, 
they'll be more riadable. 

To s.'c the demor.stratio.i, type in the fust 
program a:id s;ivc Ll. Then lyjie In llx* second 
one — -ior'c forgot to type New — and siivc it 
behind tht first unccr the name "DPRINT- 
rour '. Now reload the f rst proKrain, anc Run 
it. It will .oad the s.-coiid .)nc aid s.oj) ihi-n. 
Type Pvun ag;iin to see the co ours. T it dees 
not start scardiing on the ea.ssctie after you've 
lypcd Rui) ibr tlic tirst tinK, try it again after 
iiaving reset L% to 0. 'S it still cocsii't work 
dien, there probably is a bug in ycur projsram. 

The second program can also be ufcd oti its 
own, i;i anoi.ier program. You should th;a 

lajs th;: ir.odk m n)ude% and \vh':n you wunt 

:he text tc be printed £t the graphics cursor, 
,:;raphics% ha? to be True, otherwise 7alse, To 
nrint something in doubh-w.dlh chartcte.s, 
•yp; 'PROCDPRINT(X%,Y%, itringS)', 
where K% aod Y% aic the co-oidijiaics .(f ilic 
firs' character, atxl s rin^S is the text you w;?nt 
:o be printed. This is iv.uch like tiie command 

PKlNTTAR.:X%,Y''{^)strtrg$'. To ner<;c the 
second program with your program, tvpe 

OSClJ"LOAD' "DFRINTrout"'"' '■ 
ST:<$'^ (TOP-2)'. The cottipuler sliould 
nov; siirt loading. When ir has finished, type 
End, then Lift and the prcgrams are merged. 



YOUR COMPUTER. FEBRUARY 1£85 129 



SOFTWmi^. 



(continued from pravious page) 

300(88. dpr LDA«23:J5R«iFFEE:LDA«248:J3R&FFEE:LD)m0: .biqj 
03P LDAMB: LDY»4: ,1 oop ROLdu-- 1 ,Xr BCSverander: . resume DE 
YsDHEluuMs J3R8<FFEE: :NX: CrXMB: EMEblgt ocp : JHPpr 1 n t 
33009. verander CFY»4 s BEQf our ; CPY*3: BEQthrsBS CFyM2: BEQt 
wo 

3B010.ona CLC:aDC4t3: JMPreeune 
33011. two CLC:ADC#12: JMPresunte 
330)2. three CLC: PDCt^Bi jrPresime 
3aOt3.-Dur CLC:AEC«192: Jr-Pr^aimi* 
31301 4 RTS 

33015. print LDAt31 : JSRSsFFEE : LDA8.70: JSR^FFEEt LtA|<7 1 . JSR 
!.=FEE: LDA*240: JSR&FFEE; R7S 
3a0l/>]:NEX1 
3a017EHDPRQC 
32018 



jet)lVUEFPRiJCDPRINT<x>.7,/yV.,A*) sL0CAL:<7. 

30a2CIFnodBX=lORmode-A=4ORifodi;7."6 iMdth-/.=4B 

30321 IFnade-/.=0ORmode*/.=3 width7.-B0 

3OB22IFrtode>:«20Rniocle7.=3 wldthX^ZB 

30823IFnadL»7.=3ORniodeJ.=6: heiqhtr.-Z^ ELSEheight7.=32 

30B24FORQ7.= 17OLENA*; !def 1 = ! (!cC0a0*a*(A9C<MID* <AS,Qy.,l > 

)-53>> i do*3=( lVCIBaia*BtHt\tC(niD*ir*,Q\,l) ) 32) i4> 

3082SIFgra3hicsr. BOTO30B29 

30a2^FQRZ7.=0Tai : ?fc70'xx/.! •:-«<7:=yy7.!CALLd^>r 

3M27x X X=x < 7.+ 1 : ME XT 

3e82BIFxx7.>=Midth7. x>.7.=aiyyX-yy3t+l:NEXT:PRINT: ENDPROC 

ELSENEXT:P^INT:tNDPROC 

30e2*5FOR27."0TOl ; HOVE 1 279* (xxZ/wi dtK7.i , 1025- (1023» lyyZ/ 

heiqhtX) > 

30B3eCALLd3r:xxX-xx7.'»l:MEXT; ■ Fxx%>-MidthX XHX-0:yyX=yy 

7.+ 1 : NEXT: P^ INT t ENHPROC ELSENEXT; PPINT: ENDPROC 



Picasso's 
paintbrush 

Matthew Sillett, 
Dulwich. 
London SE2t. 



m^^ 



^■uu. 



iiiU 



The text for this prcgram was publislied in 
January S.'tftwurc Pile without itslintiiig. Htrc 
is the lull program. Pi:asso's Paintbrush i; a 
mulii-l-aturc drawing prcgram for the BBC 
Micro. Iniprcss.vc pictures car be crcaled 
quickly and easily using the iv.aiiy built-in 
(ur.cttons. 



I jAttotnatic circle. iriangJe. semi-cicle 
re:;taigle and elipse drawing rntjtinp<; 
(JExtensive colour mixing. 
□Threecu'so' speeds. 
LThree line thicknesses. 
QRubber band laoiliiy. 
□Loaa and Save screens. 
QSpraycokJui option. 
QPrint text an/whers on the screon. 
nColour-lill routine. 
nFtill MODE2cobuf qraphics 

TH- projran c.-)ntiins Tuli inst.ntc.ior.s of 
hsw to operate these fuiiclioiis and the kc\'S 
involved — al. 30 of ihcm. '["here arc thrc;: 
nictl.ods of colotr mLving provided, a.l ot" 
which dtn vjry cu;iy ic U3C. 



The first way is to fill the area iavolvcd in 
one of the tv/o colcwrs to jc ii)i.\.:d — e.g., red 
— and then to overlay it with alternate pi'ccls 
of \\\z secoid colour — e.g., yellov?. The 
combination of Red and yellow produces a 
very good orange. 

TIk .tcjoiid \%;iy s the same ahuljuve. but to 
ovurUy with horizontcl lines — e.g., a darker 
orange may be produced usng liiis tneihod. 
The fma! method is to use hi^h GCOL values 
to pioduee "hatching". Cn pressing the 
specified kcv, vou must enter lhi^ vulia- — 
e.g., 198 produces a ^ikxI hrov/n, when the 
co.ou: is set :o white. 

Copies of tlw program are available for 
£5.50 from: M. J. sSillcti, 41, Co lege Rd., 
Dulwich. I.t;ndon Sn21 . 



10REM <c)AUBUST 1984 K. J. SILLETT 

20: 

30REM h4.B. To s«v» sicturv hit f8, 

4BREM position tapt.* anH hit RETURN 

SB: 

60DHERROF;RUN 

70VDU6 

G0MODE? 

90VDU5: VDU& 
100X=>633*Y-5S0»O-ajOX-X»OY.Y;O2-XjOt^Y:PXl — IsPYl-Bi 
PK2"-I rPV7"Btn»»iRi"C«:H»B:v».tcol»7 
1 10XPB576 :P-ei R'ca: B-^a t C-Bi S-l 
120E-1:A"1:W-O 
13BPR0Cscre»n 
1 40VOII24 , 25; 98; 1 255; lQe0: 
lS0PROCcur«or<Y) 
i6aiFX<2S X-25 
170IFX>1255 <-1255 
180IFV<98 Y=98 

i<?0iFY>ieee r-iaae 

2ee)VDU24,23;ze; iz33t laee; t6COLe,/:nuvLXK,/0:i->KiNTCHR 
S22e 

210IFXPO12B GCOLC,0iMCVEXP-A4,7a!PRINTCHR»;2O 

2201 rxr-120 AMD col -a::CCLe , O : HOVCl Oaa, 7B i P"* I^TCMR#22a 

230VDU24 , 25; 98; 1 2SS; 1 0^01 

240UX=X:O\=Y 

3501Fll*:EV{-2A)X=X-e 

2601 FlNKE><-2&> AND ISKEY(-nX-X-32 

270IFIM<EY(-26)ANO I*JKEY(-98> X = X-128 

2eOIFINKE'»(-l22>X=X*3 

290IFIM<EYt-l22)AND INKEYI-l} X-X+32 

3P0IFINt<EV(-l22>AMD INKEY :-9B) >-X«-12B 

310rrrM<EY(-S8)Y=Y+4 

320 IF I NKE V ( -S.8 ) AND I SKEY < - 1 ) Y='V+ 1 b 

330IFIM<EV(-5Q>AND INKEV <-98) Y=Y+<.4 

34aiFINKFy <-42>Y"'Y-1 

.iSlfl i H f«<;b >< -4"j: ) AND 1 WEY < - 1 ) Y=V- 1 b 

3tBIFINKEV(-12)AND INKEY (-981 Y=Y-fa4 

370IFINKEY(-33)G-e:y-l 

3carriNKEv<-i i4>Q-e:y-a 

3«;0If iM<EV(-ll5)6OSU0 78B 

4eairiNt<EV<-ll6>G0SUB 710 

4H?ITFIK»i'e\ (-^DGQSUB 730 

42aiFINK:CV< ll7>AMDI^KEY<-l)=FfiLSE PROCci'ctl) 

430IFIM<EV(-ll7>AHDI^4KEY(-i) PROCcirc(3) 

44BIHNKEV(-24)PR0CeliD3e 

450IFINKEV(-fl9>PROCclrc(2; 

4fc0tHNKEV(-72)PROCr(U 

470IFINKEY <-73)PR0Cr (2) 

teBlFINKEY(-Ua)6C0L3,12a'ColtCLG 

490IFIM<eY(-23)Y=1 ; P^CICwr: twi G0T015a 

500 1 F 1 NKEV < - 1 1 9) PROCsave 

SieiFIN<.bv t-i:ikl>KHUUIoart 

520rFlNKEV(-V9)col=C3l + l:SOLINDl,-l5,10,l:IFcol<>l«» > 



P-(P*64: GOTO 150: Else IF coj -16c3i "0: XP-12B: B0TO150 

53aiF1NKEY<-97>0"l:ye 

5401 F J NKHY (-88) FX-> : FY-Ys QY-Y; PROCf 

55aiF]NKEY<-102>DX-X!A-POINT<X,Yt i REPEAT : S-1 :BCOLD,c 
Ol iC^-KUlNl (X,Y) iPROCi: tX,Y):y"l: IFP«lANDR"lt X-X-te:P«0!R 
-0:UNTrLB"l:E«0:X-OX:REPEAT:S=2:GCOLD,cnlsC"rtsPROCp(DX 
,Y»iv«>IiIF=-IONDR"'lsi:X=DX-e:P-0:R-0;UNTILB-l:B-O(S-l:S 
0T068e 

SAKIFINK^Yt-lOSlPX-XiA-PO INT (X,Y): REPEAT: S-l;SCOLD,c 
ol : C-PO INT{ X , Y ) : PROCi < X , Y > : y» 1 : I FP=> I ANDR- 1 : X "X+St P--0: R 
-BsUNTILD-l *p-0i X -ox 2 REPEATS S-Z:OCOLI>,t.ul :C-AjPROCx <0X 
, Yt : v-l : IFP»1ANDR-1 : CX-DX-B: P-0: R-C: UNTILE- I : 8-0: S- 1 : G 
OTO680 

57aiF INKEV ( - 1 04 >OX-X i A-PO INT < !< , V> • C-1 ■ REPCrtT.B- 1 ■ SCO 
LD.col :C-POI^T<X,Y) !PROCb<X,Y) i/=-l! IFP-lANDR-1 :X->+8sP 
-0:R=O:UNTILE"l:B-0:E-l;X'-DX:REPEAT:S='2:GCDLD,eQl:C-.'\i 
PROCb(D>:.Y) : vl: IFP-lANnR«l i IVXntX-FliP-eit RBin-llMTTI R-ltB 
«0: 8=1:0013660 

58alFlNKeY(-2;Q=2jy=0 

59aiF]NKEY{-90)AND I NKEY < - 1 > GOSUB 760:GCTQt5O 

c>eaiFJNKEY<-90)V0U;i: [NRJTTAB(5,l)D:U0U*:t50aue 780:0 
0X0150 

ol0IF1NKEY(-25)GCOLD,RNn(7>:PLOT69.X+RNCt4e> ,Y+RND<4 
W> iPLUl6V,X-hN0;t(fl) , Y-HND(40):PLQT69.X+RNi:(46> ,Y-flND(4 
0) :PLOT69,K"r-ND:40) ,V+RHD<40) 

620IF INKE Y < - t .* 1 ) HCCLD , col - PLOT69, X-RNO (40 > , Y ♦RNti ( 40) 
«PL0T69,X-f^NC<40) ,Y--PND(4a> : PL0r69, X-RNO (1ia» , Y-RND4'ia) 
:PinTfe9,X-RNr<4Q) ,Y-»'PNUt4a) 

o30«<F>:i5,O 

a4etFv<Q0GCTO:se 

e>50IFlNKEY (-74) ANCPX I ';0GOSUB730: SOUNDl ,- 15,50, 2:G0T 
0150 

oA0lFlNKeY(-74) ANEPX2<0 60SU374O: SOUMDl , I K , 7K,7; RO 
TOISH' 

o70IFlNKEY(-74) BQ£UB7S0iSOUN>l ,-15, 100,2; 6010150 

oBacOIOlSB 

690END 

700OZ = X : OW=V! v»l i G-1 t GCOLO.coI : MDVEX , Y: DRAUX , Yj RETUR 
N 

7 la&ccLD , col : mivtu/ , UUj UKAWX , / : Kt i ukn 

720SCCL0,B:MOVEOZ,aW:DRAMX.Y:RETURH 

73aGCCLD,col:NOVEX,YtDRflWX,Y:PXl = X:PYl=Y:ReTtJ=»N 

74«eCCLD , col 1 MOVCX , Y : DRAHK , Y i PX2-X 3 rY2-Y: U- 1 : RETURN 

750GCCLD,Col :MOVEX,Y«DRAWPX2,PY2:PLOTgS,PX: ,PYl:U=e: 
PX : "-108: PYl=-ia0iPX2=-;Ba:PY2— 100: RETURN 

7i^itFX9,e 

770RETURN 

7Ba«FX9,2S 

790RETURM 

800DEFPROCscreen 

810GCCL0,7:MOVEia,5;RRAW1270,5:DRAM1270,10:4:ORfiWie, 
iei4:OR^VIia,b:nOVElS,10:OR'^W1265,ia:DRAyi265.10a9:DRAM 
15,10a9:DRAW15, 10 

820yDL4 : COLOUR7; PRINT-ABC 1 ,30 1 CHR*22S: FDRF=0TG 1 E : COL 



130 YOLR COMPU-ER, FEBRUARY 1386 



sf^Twmmt. 



OJRF : PRINT TAB (2+F, 3D) CHR1227 j-NEXT : VDU5: M0VE15 ,85: DRC^W J 
2&5,S5; MOWEJ5 , ?0;DRftW1 7A.'i,9« 

830EMDPROn 

S4aDEF PROCcarsor Ix > 

a50GCOL3 , 7 : FDRF= 1 "r04: MOVeX+24 , Y: DRAWX-2'» ,Yt MOVEX , Y+2 
4:DRAW:<,Y~21:NEXT 

860 IFx"! END=»RCC 

B70IFX=OX AND Y=OY EMDPROC 

8BBGC0LD,col 

e90IFQ=« l1QVE0X,0Y;DRAWX,y 

7901 "Q=l t10VEX-26.Y+I2iPRINTCHR*224 
"TiairQ-S HOVEX -11,V-i-1iPf<IMTCHR«33& 

92BENDPR0C 

93BDEFFf^0Ccirc<N) 

94HMFX1H, I 

950VDU21: tNPUT7AB(S,l JSs VDUAjMOVFX ,Y:SnOLD,col! IF N» 
IFOR r/.t-BTOSAB STEP18:MDVEX, Y:PL0T85,COS=^AD( 111) •( 1B+S> 
+ X,5lr>RAD<IV.>«<lB+S)+Y:NEXT 

960IF N-2F0R I>.=0TOie0 STEP18: MOVtX. Y:=L0TB5,C0SRAD( 
IX) #(ia-lS)+<,SINRAD<IV:)«tllJ<-S)+Y!NEXT 

^'BIF N=3MaVECaSR£*D<0) • (i0« S) +< ,SINRAD(0)*( 10t3) +YsF 
ORiy.-0TO360: DP AWCQBRAi; ( 1 :'.»*( lB+S>+X,S:NRADa7..'«<ia»aJ *■ 
Y;NEXT 

980UDU26 

V9B£NDPROC 
10B0DEFPRn~(>lipseiVDU21: INPUTTAB(0,5: t'/.i INPUrTAB(B,5) 
V7.: VDL!6 : GCD^D ,col : MOVEX , Y : FORI y.-aTa360STEP2: MOVEX , V : P_ 

0TO5,eiN:RAR<iy.> : •xy.-«> ,cos<rad(ix) )»vx*V!NEXT!CMOPRor 

iOiaCEFPROZr <H> 

1020«FX15,a 

m-^n^riM^I : TNRIITTnB(0,S)U: INPUTTAB <0. 5) V: VDU6: 500LD, C3 
] : IFH=lMOVEXiU,Y-V:DRftWX+U,Y+V:D^AUX~U,Y+V:DRAWX-U.Y-i/ 
:DRAWX+U,Y-V 

1 0'»01FH-2HOVEX+U , Y-V: DRAWX+U, Y-K^i PLOT85, X-U , Y+Vt DRAWX 
-U , V-Vj Pl.nTB5, X+ll , Y-V 

1030GNDPROC 

1 B*.0rFFPRac:wr i te 

107a«FX15,0 

10-30GCaL0,col 

ia90A*=SET*:naVEX-6,Y+12tPRIHTA«:X=X*-64:ENDP=M3C 

1 lDeDEFPRaCs«v« 

1110^'1>U24,25;20| 17S5: 10190; :GCOLje,l}: MOVE XP,7a;FRINTCH 
R»22O:XP-576:col"7:GCOL0,7:MOVE XP,70i PPINTCH=*»228: VDU 

112e*^5AVE SCREEN 3000 8000 
1 ISBENDPRfin 

I i4(nDFFPRnrio«d 

li;iM*lO. SHREHN 

1 160V/DU24,2S:20; 12bbt ISMPI*. : RCOl.0.Gi M7VE XP,70:Ff^INTCH 
R«228:V0U74,25;93; 1255; 1000; 
1 1 70y- I : X-&33: Y-5B5: XP'S76; col "7 
1 180ENOPRCC 
lI90»FF='RCCb<«,y) 
12005"E 
lilOq^ytz^y 

1220IFS-1 IFPOINT:x+a,v><>C D-l 
l.i:^Ulhb"2 iht-aiNT .>t-a,v)<''C D"I 



1240REFEAT 

1 250IFFO IMT (X , q+4 • < XIi P-l 
1260IFFOIHT<K,i-4'<>C:R=l 

1270IFc=v AND E-2 AMDINKEY (-74:=FALSE MOVE x,y:PL0T69 
X V 

' 1 2801 FP=0ANDe= 1 1 MOVE x , q t PL0T69 , k , q +4 
1290IFP.=aANDE=l:MOVE x ,z :PL0T69,x,z-4 
13BBq=c+4:2=z-4 
l,SialFINKEY<-74)P"l!R=l;0»l 
I520e=E+liIFE«:3 E=I 
133aUNTILP=l AHD R=l 
i54eirc-t c-2 
1550IFG=2 E"! 
136eiF0=l BBl:Oxe 
1 :^7BFNnpRTr 
1580DEFPR3Cf 
139aGC0LD,ct:l 

i4eeREPEAr 

141BPL0T77,FX,FY 

l*2aFY=FY*-4 

M3BUN-ILP0INTCFX,FV) OB 

144eREPEAr 

145ePL0T77,FX,0Y 

14680Y-QY-4 

l'»7eUNTILPDlNT«FX,QY)<>ai 

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149eDEFPROCi<x,y) 

15ieiFS=l IFPOINT(x-8,yK>C D-l 

I52PIFS=2 IFP0tNT(x-8,y)<>C 0-1 

IS^BRFPFflT 

lS4eM=-N-M 

ISSfllFP-BANO W"l MOVE x ,c:: PL0T69,x ,q 

1560IFR=BAND W= I MOVE x ,z: PL0T69,X ,l 

1570 1 FPO INT ix , :i+4) <>C:P« J 

ISeaiFPOINT"x,i-4)<>C:R-l 

159aq«q+4: 2"2-4 

160flIFtNt<EY.-74>F>l:R-l:O-l 

1610IFH=2W=O 

l62aUNTIl.P-l AVID R-l:kH0 

lb.iUli-u«l l5El:u-K:b-2 

164eEN3Pf:0C 

l6SflDEcpF0C|>(x,y) 

l<>6Bq'»/i x-'V 

I67BIF5"! IFPOINTtK*S,Y)<>C 0-1 

1688IF3-2 IFP0IN7{y-8,y)<>C O-I 

1 AQflRF'P'AT 

170014-^^+1 

l7iOIFP-BMOVE x,qiPL0T69,x,q 

1720IF^"aMOyE K,z:PLOT69,x,i 

1730IFPOlNT(x ,q+i)<>CtP-l 

1740IFPOlNT(x,z-*)<>C!R"l 

1730q=q+A:z"l-4 

1760IFINKEY<-74)P-liR-l:0-J 

I7/0UNI ILP=»l AND R-1 

1780IF0-] B-1:D"B!E"2 

I /VOEfOPhUC 




Artist 

Johr McHale, 

SUgo, 

f.re. 



Tins PROCKAVI i.-.sns ihe CBM-64's hi- 
resolution graphics thciliiicsanJ enables you 
111 diaw impressive pictures C'li srrcen with the 
added bonu^ of being able tc save iny picture 

cieaud, to lapt w ih ihc touch of ^ne ke/. 



e REM * BASIC LOADER FOR MftCHJNE CODE * 

1 REM *t.mn%%w.*WMwni>n**** 

A KEM * :0Y5TJCK Rf^T.. # 

3 REM * FOR THE CB^ d4 « 

4 REI1 * WRITTEN FY * 
:: REM ■♦! JOHS HC HALE » 
e REM * SLIGCEIRE ♦ 

7 REM #******»*««*»**»(#» 

8 PRINT "aaSTHIS =>R0GRHf1 USES 
10 C=C+1 IFC=i:rHi:N!>Yb4yi:«y 
20 PRINT'nga PLtRSE Wflll , LORDING 
30 FORT=iiTQee'C0 ■ NEXT 
'■a LOU)" /I. 1 



fl JOYSTICK Ih FORT ?..• 
'ftF:TIST CBM 64-' 



■ FCRrseTOi-oei?: NEXT 



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lcon{<n(iad on next page) 



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^3^^ 



Lander 

Dav/d Hodgstts, r 

^ipton. 

West Midlands. t: 

Land)' < is ;i game for the nnwpandcd Vic-20 

iinil a jtwstkrk. 'I'll.- gime comes in six parts, the 

first is a lo;>din|; screen, i:ic next four arc for the 

naniiic <<^kI(' mi\ graphics, and thi tati pari h. 

ihc actval gan:o. 

The i:iea of the game i: to puide ytmr landing 
crafi through an a^te^»ul belt tiiid land it 
safciy on the pjil lelow. To mtkc :hijigs more 



difTicjlt :hcie iJ a time limit which is displayed 
at thcbo:lon of the screen, tr\' and be a> fast aj 
Possible as your score is based on how ir.uch 
linic you hai'c left ofttr lending your craft. Ai 
ycu drop the speed of your ciaft increases, 50 i.' 
ycu wan; to slow your dcscait you can thrus* 
by pulling bick the joystick, but you cannot go 
upwards 

At :he otort of cIk guinc there is a tiilc pa^e 
with iwc options, Fl for the start velocilv ot' 
tlw landing craft, ar.d P3 for tiK isleroi*. 
sixed. As the Ic'clsget hi?he: tik: a«eroidi get 
faster, but the stiri vckx-ity jf your craft 



reniaii's oinsiant. 

Type in ar.d save each of the proijranis, in 
order, one aftei tl.e mhcr, anc. lead us.ng 
&]iiueU tuii-si'ip. Each of the data :)ro^ia[iis has 
a clieck >um to mike sure hat the caia is 
correct, as if there s a in:siake in ihc dan- it 
could cause the program to crtsh, so if you jet 
a data erri)r re-cheC't the data and re-savc :he 
(.oi.ecied vcrsior. 

If there are no data errors then each program 
will load the lexl. /Micr e;i"h pan ha% finisl-cd 
loading: tl.en the border colour of t.ie -icrten 
will chanee. 



ProgrBm t. 

10 POKESse/y epftiHT'na- 

:i0 PRIHT",*»li»»piL'.r:> i9B<^" 

40 PfriNt",!»»l»PL£H¥E HAIT... ■ 

513 Fi;<RR='3f09 POK'F6:-l1+H,PPE*C<^0916*ft>:HfiXT PgKE199.9 

Piogram 2. 

199 5-7-16e.F0RI=S"0&OJl : Kth'UXX»C+X POKE 1 /X ^ NEXT 
110 IFrj<:>365:iTHENPRINT"DftIH ERRCRM"-ENI> 
120 EflTfl3,13,31,50;59.63,50/ie 

140 liFnH31,7 13/25.4?,'i9v49.49 

130 IIRTH248.224, 176.152. 149/140.140, 146 

169 3DRTfl34j4. 1?. 4.0.5/9. J 

179 rflTfll32.:6.64, 8. 160^0. 1:^8.9 

180 BRTRS. 1.7. 31, 60.57. 123. 127 

199 rpTfte/i60.a4e.223- jse. lee.soo. iss 

209 ERTR123.239.231,247. 127/ 121 '29.7 

210 rflTR255.207, 190,258. 242,229.216. 46 
229 WTR16.59. 127.255,2«^-2«5.295,25S 
238 IHT fl255. 255. 255. 255. 2b5. i;35, 255. 255 
248 IFiTfll2, 16.30.72.147, 164,41. 10 

238 rflTfl4fl,fl, 108, 18,201,3"'. 148.80 

268 Iflrfll0,4J. 164.147,72,38.16.12 

27Q I)RTft80. 1*8.37.201.16.100.0.48 

208 r!HTR24.2*^.24,.60.36.60,36.9ft 

298 BH1H102. «6. 126/66. 255,- 12y. 253.253 

300 DflTfi0/0. 8.0.0.0, 9. e 

318 DHTfl0.0.e,0.0/0,8.€ 

320 DflTH0.9,8,0.0,0.e,€ 

330 DflTfi0.0.e,0.0.0.e,e 
;.v'j DRTfl0,0.e,0.0.0.e.€ 

350 UHTfl«,0.e.0.0.0.8.e 
360 tiflTR0, 0.8. 0.0.0. 8.8 
378 W=iTfte,0,8.0,0,0.0.e 
j«« imHy.0,8.0..0,0.0.e 
398 IFiTfl0. 0,8. 0.0. 0.0/0 
400 mTFi0.9,0,0,0,W.8.0 
■»ie inTn0,a.8,0.0/fej.y.« 

420 IjfiTfl0.3.e,0.0.0.0.0 

430 DRTft0, 3.8,0,0.0.0.0 

440 UHTRe/a.e.0<9. 0/8/8 

450 DRTfl255.0.0,0.0.0.0.255 

468 DRTFl255.e. 12&.12e. 126 128.9.239 

470 DHTR253.e. 192.132. JS»2, 13E.9,2iiO 

488 DRTft2?5. 6,224,224.224.224,9.255 

498 !•=* I H255, e , 240 , 248. 240.243 . 8, 255 

500 lRTRi^.5,e, 243, 246, 248,^43, 6/ 255 

510 DRTF255. 8. 252.252. 252.252, 8. 255 



520 
530 
540 
550 
560 
570 
580 
390 
600 
610 
620 
630 
640 
650 
660 
670 
680 
690 
700 
710 
720 
730 
?40 
?50 
fcy0 
€10 



DfiTfl255, 0.254, 234, 254,^54. 0.255 
BHTfl??'; ,0' 255, 255. 235. 255. • 255 

DPTfi8.0.0.0.0.8..0.0 

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Df'TH8/0.0.0/0. 0.0,0 

DFTfle. 0.0,0. 0.8. 0,0 

DMRe.0,0 0.0-8,0.0 

DfTfi8. 0,0 0.0.8,0,0 

IiFTfl8, 0,0. 0,0.8,0,0 

DFTR8.0/0.0/0.8.0,0 

DFTH:60.0. 169.10.153,236.31,16? 

DPrfl5- 153.206, 151,152.201.5. 144 

I)FTfl:0. 16S'.4l/ J53.228.31.169.2 

DFTR : 53, 228 . 1 5 1 , 280 . 1 92 . 22 . 208. 226 

IiFIRS>6. 0,0, 0.0/0, 0,8 

DFTfle, 0.0 0.0.8.0.0 

I'hm.bif.y 254,*4, 130.189.44, 150 

DRTR41, 3. 240.5. 163. 1.157, 44 

DflTR:50/ 232.- 22^. 110.208. 236. 96. H9 

DHTFizS, 133/55^ J33.5i:.96, 169.235 

DflTR:41/3,14<»/!63.8.14l, 15. :44 

DRTfl96.0. 8.-0.0.0. 8, 1? 

PO;e36979 . 1 PK 1 N I • fl«««tWWl«' 

FORH=01O9 PO<e631*R.PEEK';60yi6+HJ ^t-CXT P3KEl98,« 



Pfooran 3. 

138 5=6656 :F0RI=ST0S+51 1 : REflDK ■ C«C+X POKEI. X ■ NEKT 

lie IFCO50802THENPRlHT''Dfllft ERROR! r'-EHD 

120 DRrR160,0,177, 1,281,3, li-O. 12 

130 DHr'H280 192.2.209,245,160.22.177 

140 DflTRl.281.6. 176. 13.280,192.24 

1 5R rRTH20Q. 245, 9€, 201 . 32, 240. acD. 76 

150 Dflrfl82,Z6,291..32.240,239,'6,e2 

170 DBrR26. 96. 160. 0.169.32.145,1 

130 riHIHPBH. M5, -, 160,22, 1^9. l,iy« 

190 PRTfll45- 1.173. 53. 3.240/18, 1€0 

280 DRTR44,173,54,3, 1*3,1. 173.5; 

210 IIRrR3.2e0.145. 1. 169,3. 141 .. 'If: 

220 DRTRS. 96. 141.56.3.201. 11 /20E 

230 DRTRIS. 56/ 165/ 1.233.22/176.5 

240 DHTR198.2.133.1.32/172.,26.234 

250 DflTR120.. 162. 191. 160. 23'^. 142.20 3 

250 DRTR140. 21/3. 80, 96, 173.53.3 

270 DRTfl240. 13. 160.44.. 173.54,3, 145 

230 DRrfll,2e0.173.55.3. 145,1. t6P 

2^0 DflTH0, 169.12,143, 1, 152.2.32 

330 IJRrR226.27.280.169, 13. 192.2.208 

310 DHIM^-i^i. Iiy:)/2ii.l6y, 14, 145. 1.162 

3^0 DRrR2.32.226,27,2ee.l69.15. 192 



132 YOUR C0MFU16H. FEBRUARY >9-t5 



soFTwmsmE. 



330 DHTfl54 , 205 , Z42 , 96 j 1 73 j 53 j 3 > 240 

J4e DfirFiia, lec/'**/ 173^54*3^145/ 1 

330 Dnrn209. 173/55/3- 145; 1,96/0 

360 DFirR169, 176/ 162/4,221/6/39/208 

370 DRTRSj 292^224/ 255. 266/ 246, 162-4 

380 IiRTR254;6/30.1e9,:86/i;21,3/30 

390 imimidfi, 19/ 1^9/ 17$, 157. 6/30.262 

460 D(=ITfl224, 255, 206/ 236/ 95- 1*52-0- 3ii 

410 DFITfl245/25/ 189/0/ 150/ 41/ 8/ 2*^0 

420 liHTfl5,159.-?/32/15;/25/232/224 

430 DflTR22- 208, 236/96. 0/0/0 

440 DHTni62/3S.- 160,30, 134, :, 132/2 

450 D(=ITfll69/ 1. 141 /?2/ 3/ 169.0/141 

46R T1HTRS3/3, 141 /SE/S, 120.- 162/ 34 

470 DRTfiJ60/27/142/20,3/l40.-21.3 

480 I"FrrR88/?6/ 120.32/9/26,206/ 52 

490 DHTH3/240,3, 76,36' 24, 169,16 

500 DRTH)41, 32, 3, 173,47,27.201,4 ^ 

^10 Dffl"R]44, 3,205, <i7/ 27,32. 42,26 

S20 DflTR169;fi,141, 19.- 145, 1'>S',127, 141 

230 URrR34/145/lS9,16'44, 1~/ 145.20? 

240 DflTR10,198, 1/163/ 1,^01-233/208 

550 rflTR2/ 193.2/163/ 128/44.32/ 145 

560 DRTRZae, 6. 233/ J / 208,2, 230, 2 

^,'0 DRTR24/ 165, 1 , 195, 22.- 144, 2. 230 

580 J0PTfl2, 133. 1/169,8,44, l^', 145 

590 DPTfl208,36,23y,4/,2r'/2^):!,4('-2c 

600 IiFTfl:73, 47, 27/201, 32, 144,5,169 

610 rifTfl32/141,47/27/16«/44/177. 1 

6iiW Ut-im'?l.-54/sJji00,17T, 1/ 141,33 

630 tif-(R3,. 169- 1,141 ,53, 3/32, e 

640 DPTR26/16PI/ 0/152/145/1, 162,;} 

■559 IlRTfi.?^ / Z2I:. , iTT / 2i30, 1 :«2 , 2 .- 298 - 3:43 

660 I«RTfll6e,22, 169.2,145,1,162,3 

670 DflTfl32/22f/27, 169,3,203/ 192,24 

COO rinrR2eC,242/173,53/3/240,23, 143 

690 DflTR44, 169, 4, 234/145/ 1, 162,2 

700 DflTRr:i2,226, 27, 200/ 169/5, 234, 145 

.'10 CHTHl, 162 2,32, 226,27,76,36 

720 DflTft24,0, 165,1 141-242/27, 155 

730 DRTflZ, 41, 3. 9. 148,141,243,27 

M<if I>HTfll3S, 15-?,U3,150.96-0,0.-3 

750 DRTR0,e.>0.0/0-P'.i?,n 

80(ii f-i.>K.h^6879/ 1 2 : PR I NT " HWraWBWO' 

8ie Fr(Rfl=0Tri9:pCI<'F631-ffi PEKK'.60916+R> ^NEXT : P0KF19e,9 

Program 4. 

lee S-«4ee FORI-3T0S+2C-::REPlIW:C-C'M:rOKE!,X:NEXT 

110 IFC<>25259TH£NPRIHT"DftTR ERROR! r:END 

120 DPTfll73/53/3/2<0/ 18/169/0/ 185 

130 IiRTn54/r3, 291,6,240,242,201-' 

140 IIRTR240, 238, 201?/ 192/2/208/240/162 

150 DFTfl43/160,30, 134,3,132,4/160 

160 IipTfil, 140,60-3, 177,3,231,6 

170 DFTfl240, 15,200,192/23,208/242/32 

180 DP TR196/ 25/ 1S5, 4, 291 , 32/ 208- 231 

190 DfTfl9K,3? 16P1.?S.?4. 165,3. IftS 

290 DFTfl22, 144, 2, 230, 4, 133,3,172 

210 DFTR60,3, 32, 169/25, 172,6e/3 

??e) DFiTRI3e,2e8,2, 160,22/ 140,61.3 

rfiTfll65,8- 145/3,32,176,25,280 

IJHTHL9Z,25,208,2/160/ I, 169/9 

DfiTRl4:/3-32> 176,25,56, 165/3 

DRTR233,22, 176,2,198,4, 133,3 
27y IiHTH172,61,3, 169,6, 145,3,32 
280 DflTR176,23,200.192,24,208,2/16e 
290 DflTfll, 169/7,145,3,32, 176,25 
300 IiHrR172,63,2- 76,42,25/0/ 157 

310 DflTfl3, J50/ 157,228/ 151,96/0/0 

320 DflTfll69, 32- 145.3,200, 192, 24,2y« ^ - 

330 DflTfl2, 160. 1,145,3,96,0,0 

340 DRTR165, 3, 141,193,25, 165,4,41 

350 UHtHi.y.. 14y/141,iy4,^.'D. IW.-'i 

.360 DRTfll53, 249, 151,96, 165/3,24,165 

370 DRTRSb/144, 2/230/4, 133/3,96 

.380 DHTfll6i?..0, 169,32/133, 22,30,153 



230 
240 

250 
260 



39^ rflTR206/30,169, 1/I53,k2/ 159,153 
48e DftTR20«, 130. 135,203,237,96,165,1 
4ie DRTR141,251-24, 165,2,41,3,9 
420 DflTR14S, 141. 252, 24, ?6, 222/ 9, 150 
430 l'HTH222,.JSS. 151 , ?6, 3, t, 3, '3 

800 P0Ke36879, 1 3 : p=i 1 NT " ^jmmm" 

3ie FQRP=0TO9- PCIKE531+fl, PEEK-;6t916+F> '• NEXT : PGK=;i39.. 3 

Prograt) 5. 

■^1 ?^nit^-^^Si"l^''^-*255 • RiftBX : C=C+X PCKEC , X- NEXT 
.10 iFC<>2/675TH6NPRiNT"rrrrH ek=?of: ; ' •• = END 

•20 DflTR169/ 0. 1£5/ 22,30. 201 , 7, 298 

130 DRTfi7, 169,6,136, 153,22,38.200 
1 40 BRTF 1 8^ , 242 . 30, 20 1 - 7 , 208, 7 , 1 69 
139 DflTfle, 136,153,242, 30, 200, 290/192 

169 DHTH242, £08. 223, 96,206, 63/ 3, 240 

170 D^Tfl3,76,l?l,234. 162-3, 142,63 
189 D=^Tfl3, 174,62/ 3, 222,232/31, 189 

J 99 DHT/»232,iJl , 201, 33, 208 a 3/ 206, 52 

260 'WTHT/'^e'F . 8V^2 . 1 94 . 26 . if,?. ?5fi' 

ZIP P^Tfll42/56/3/76/ 191/234,0,9 

220 D-=tTfll62, 160, 142, 10, 144,32, 120/2^ 

230 ri^Tfll74/ 62, 3, 222, 232, 31 ,18?/ 232 

240 r^Tfl31/201,33/20?,5,296,62,3 

250 DRTH243,25,32, 192/26/ 162/ 192,142 

269 I)^Tfll0/ l<4,32,12«/24/76/80,24 

279 DHTfil62, 16, 162, 255, 136/208,253/ 202 

288 OflTfl208,250,96,238,62,3/l62/ 128 

290 Dflrfll42, 10,144,32, 120.24, 174,62 

309 IiflTf13, 25'i, 232, 31. 1€9, 232, 31,201 

31« nHTfl41/ 144,10,23Sf/62/3/173.62 

320 raTft3/201/lB/240.11, lii2.176,142 

33^ IFtTftie, 144/32, 120, 24/. '6, 134, 24 

349 lHTfll62,9, 142,10,144,96/173,53 

359 I]RTfl3/249,6/ 162,128/142,13 144 

im DOTflSe, 162/0, 142/ 13/ 14<», 3(5, 160 

379 DflTfl0, 169, 2,32, 230/24. 160,23 

389 DflTfl32/ 250,24, 163, 1/169/7, 32 

.330 EIHTfl2j0, 24, 160/ 22, 32, 256, 24, 96 

400 rRTrtl60, 1 . 169,2, 32,250,54, 160 

4 1 9 rfiTft22 , 32 , 25'? , 24, 1 60 , t> , 169 , 7 

4'fl-) ininOi/ 250,24, l.;9, 23, 32,259, 24 

439 rflTfl9t,0.153, 119, I50'3i6,0,9 

803 F0KE3e879,14 fPlN7'flBWMU«;«M" 

l^l^ F0Rft=eT09:P0K.Ee31*fl-P=EK'.6e«l6+A) .MEXT:pnKFt^«.S 



Proaram 6. 



lOTBKBBr <jO^\)9ita■S^'S^€6^ 



60 ■'Kit-tftt "jiiiint;*' 

76 »(»IhTn*.-T3>C<EJ-lKKKKTIWl»' *'I»l««0 W(" 

W .<•!^UP«Oa>•JS> ir(K>y-3fWPXCy»3>0ft.fl"3BHDX>7flN»H<K>lHCNW 

se PRIhtLEf T»(n« ,ft) ; 7ftB<Xi ; "AFOlMUl" V-X : hEXT 

leO 9V$6<fU 

120 Pi^EElC 62*) IFPO^WJIPOIlTH-NSYSeiTSOOTOSiO 

129 SvlfnSC ia>-{}1UKH3a9 

126 r-t-H ; IM"W1HtMSV5(>4»):|«e 

i3e svfsmoOToiio 

299 WIWr««-n'8PC<E>'H<i<K>: IWW PWPWWPItPII'M-U-Z^lFW^lTHeNWl 

239 PO»E3«e78.B S«'5338 Fr-RS'STOlSa HEX" 

244 l>0»E36«7?-8 UV":,V.l IfL\".3TM;HSTS66fle OJTKe 

25« l'»CJ«Tl.«FTJfft».l:>3^C«i>-|Bl>ft'ie CvEP- 'FOW-eT<«CflO. HCK1 Rl«« 

see Por£364^!f, 14 w3ti'ti6Bw,i;4e ; H.(iH r-n- 

510 F<»«-er0aiP0>e76J9*H, 16? PC<E3£4B8-n.«*ID? 
328 P0» £8 1 »4«F , 1 6» (»0<e399e-«-P . WMB? NEXT 

S3e PKiHT-ww im im an w ai " 

331 PBlHT- W IW mp i «■! H aMI XMIt Jl Hill II " 

932 p«t!Nr-iaiv-;^C'.7>;~*> •« iihmi »t ii niHii n ii miifl tpi mihh »pii 

332 PH mi -vnr ;»»".< 12;;-' all uti ir mil ii »iii n niii " 
?3-) ^^RiNT-'mn' .$Pt<i?) . 'iiD UK nt mi hi " 

3J,-: ^ciNT ir.im ■£*',■■ \T'. a» siti m t|ifi mm n fliti »i " 

33« PSlNtt-EFTKHf !9,'>#«,y Jrt'flnD HODOeFTS." 
537 PRIKn.m-«Rf.2ir»fJ»»Tre5 FIRE TO PLW" 
54f Pft:NTLtFT«<fll 14rH STMT '«LOCtTv;-;v 

568 5e'C» IFC1-"«*THE>»V»>,+ 1 LFV?9Tt1£MV»a 

57? tFCf-"'5-TI-£HS«S»1' IP?>9THehS»e 

SB? SV56683 •5'<S7632 FWE-ero.OB NEXI 

S9€ rF'PEE<(3;iSI>ftHro2',<>eTtfEK34e 

^e* eE'itRrt 




Toolkit 

H GeradtS: 
The Hague, 
The Neihertands. 



ToouciT C0MBIK.\TI0K is a aiachir.e-code 

program which alowi iht jstr o." iht 2X- 
Speciruni with only cne USR instniciion to 
get a variety cf inforrriEtion about a Basic 
program as well as about one written iti 



rjiachine code. Several of the rcutiies have 
iL-cn published before, but the disadvantage 
of these is thai you hin-c to .<ecp track of a 
terice of aidr;ss«E. 

Access of a machine-code instruction 
Jirictly from Basic as was done in tac 
progran published in Yottr Computer, 
SepterTibcr 1983 dv Gar\' Rces causes trcubles 
neciuse the spectrum seems co dislike the 
IM2 ir.strjction. 

Toni Biker warns fgainst using ih; IM 
nstruaion on page 102 of her bock oa 



machine code. After some time a system hang- 
up appears to occur. \cvcrthclesSj Garj' Xccj' 
program is quite interesting be-:ause it giv'esa 

useable way ot' prinf.ng numbers on screen. 

The same method h£s been uied in th.s 
progranj; the prcgrom |ivc3 e menu of the 
options — analyse memory, the hex/dec, 
dec/.iex co.iverter ard soms smal.er routines 
are adapted from the program Supeicoce fcy 
CP-Softwarc and are published with its 

Icontir.ued on page 134) 



YOUR COMPJTER, FEBRUARY 1985 133 



(continued frotr. p6gf> 133) 

permission. Now u short description of these 

oplions. 

Analyse Ma)w^<: Th s g:vef the address you 
have choiiin, the decimal value, the iiexa- 
dccimal value and the charact.-r — where 
printable — in the address. You can choose 
the fir;t addr^BK by Randomise no; USR! — 
addicts. AH the following addresses irc 
printed until ilie sjrecn is fill. The Scroll? 
message is then printec. If you piessn you ire 
back in Basic, 3ut it is possible t.> get ihe 
menu back if you hove pui (he instmction: 

RANDOMIZE USR 64360 ir a Basic line 

The ofiions Memory free, I'roglciiglh, 
Varlen^th. Pro. + vtrs do not need any 
explanation. Neither docs the :>pion R.i"rirop 
Vou hive onl/ to press the letler behind these 
options lo see the value (rf" these psrametir.s 
priniecS on the screen. 

The second optior in the menu is Francs + 
iiouijU. Tills .b tH)i J very tiseful routine but 
more sonieihin}; like a cemonstraiion that 
Spuctram does luve a clock iuside. 

You :an get back 13 the menu by pressing Z. 
Z is also used to get bark iii \\is\r Thai is i.ic 
•*'a> tc get into Btsie without Caps Lock, 
because ihc in;ic:;iini-code is .iro^ramnied to 
be 'Jsed with capitals. It has other tca:ures, 
which [ hope you will like: Paper an.i Border 
blue. Ink white and a mori* rtitlihe louud 
t'ror.i the leyHoa-d. These arc permaiuni in 
Base until yo.i change them back. With Inwr- 
face 1 connected CLS a will change the 
cokurs to black and white. 

Breaking out of the machine-::od:: with (Japs 
Loc<-Break is possible too, Thcie are three 
C'lliLT <ipiions which T iirin'i m«.-iti*>n. Line 
addiess, UDG, anc 3. The firet is qui:e 
straightforward. I'ui the tuisor in a Basic lin^, 
and L wil. tell you the address o! the firit 
thaiacter the cursor points to. Easy to sec 
whtTr' T- HsKir propranv endv. I.'DCf again user, 
the variable Seed. If yoti h.ivc ycur own 
UDGs son-ewhcrc in memory, e.g. 40000, use 
Ran:loniz« 4CL)Uli, go to the inetu and press 
U. To get back lo the Spe;;truni UDGi you 
can use rhe S. 

The .asi optior. is prissing V This i$ not 
nentioned in the nenn. If s^r«i 'he Microdrive 
variables — with Inttrfare 1 connected — and 
give* a yellow flashing Border when Saving ■ 
etc on Microdrivcs. 

Now for the Basic progrtm. The mac.iinc- 
codc is cxacilj' 1300 In'tes long. Each Data 
s:aiement is one hundrjid byt;s. Type it in 
and ruu it. Three things :an happen. You 
Ijave ai; the uumbers tj'ped in correctly — 
CDngraialarions, I never succeed in doing tha:. 
Then ihc pio^ram will run tO the end. If on 
the other hand you forget a njniber or tj'pe 
more than 100 numbers in one sta:en:eni yo.i 
can expect iheSptcir.im to give the some.vlui 
unfr.endly message "NonAcn>e in Ba-iic' , 
bcLil.l^e ii U reading a numerical Data instead 
of a siring variable. Anotncr pcssibiliiy is 
tvping f. wrong number, 

The progran then gives the Lire \-\ which 
the error has occjrrcd. It conttins no 
safeguards against typing two or aioie faulty 
numhersj if th; sum ,s the sam; as that of the 



sofTwmmE. 



Th« N«th«rl«nd» 

Thi» prcsrta contiint 

ttvtrti. rouunci (rem 

"SUPERCODt" BY 

CP SOFTWARE eNQLRMD 

3 RUN 1000 

se DffTR aee, 164, ses^aA.g, 826,1 
a6,3s,aa«, i67,aae,si5,aA,24.7,i/B 

6s,iie>,97, i»e,iai.ii5,iel,32,ie9 
,121 i®9,Lia,ii4.isi,3©.3a,e55,i3 

.73 •i4.,47,l6fl,lSl,li5,i3,ll3,il 

1,117, ila, i3S,6e.3S,7a,43,el, i5, 

68,802,97, 12(3, 100, 114., 101,118, 11 
5,58 6,76, IC, 77, l6i, 1*9,111,114, 

i2i,ia,na8,ai4.,ioi,i«i,53.6,?7,i 
3,90 lid. vii, iss.ies, idi,iiA. ico 

31 Dt^TA "S692" 

55 DRTA 6,80, 13,80, 114, 111. les 
.32 , A3, 32, 118,37 1 14., 1 lP,eS,fi,84. 
,13,82,97. 189, 116, 111 [118,56,6,8 

a, 13. 66,9', 114, 108, lel, lie, 183,1 
16, 164., 88. 6, 86, 13,65,68,71,88,24. 
9,6,32.13.97, lafli iiW , 11 A , lai , llB 
, lie, 6, 85. 12, 85, 68771, 3i, 83,112, 
iai,69,116,li4.,iL7,lS9,f8,5,83,i 
3, ?£, 101, lae, 4.5, 62, 68, 56, 72. 59, 6 
e , iCi , 99 ,4.5 ,62 ,78 , 58 , &8 , 13 . 49 , ia 
0,ie6, 116,4.0, i«a. 4.8 

53 ORTR "7649" 

6* ORTR 99,97,:iS,l«l,il,88,6, 
90.28, 14,10,18, 1.62,62,4,229,178 
,0i,9,ai6. 1/5,17.156,0,33,106.0, 
208, 181,3,283,20^,1, 1"^ 4., 853, 203, 
1, Lio,4a,iS0,58,e,9a,2li,63,a54, 
90.2dS:,l?2,262,2S4,76.2e2,3a 263 

40, 98, 254. 77, 40, 108, 264, 51, a64.i 
61, 254, 25*, 82, 20a, 24. |S3, 254, 86, 
40, 108,25*, 04,*©. 62,43*, 65, 4i 
83 Dti^T!^ '12829' 

56 DRTfl 34, 254, 83, 40, 39, 25*, 70 
,40,106,197,805, 142,2,193,33,32, 
39. ie7,S3?,e2,AA,ll,ai,173,fi*S,l 
7S , Se , lie 92, 2* 1 , 195 , 96 , 2S6 , 226, 
201, 4 = , lid, 92, 34, 123, 92, a 15, 24.1 
30.45,130^92, 1'', 167,0,267,82,34, 

iS3,ca^2i*, i6s.46,a3aa0B. 155,25 

3, 42, 8§, 92, 237. 9 J, 83 ,$2,237,82,8 
4,80,205, 163, 263, 42, 76, 92, 237, 91 
, 33, «£, 237, 82, 24, 66, 205, 153, 263, 
42 . i-?8 , as , »37 .91, 101 , 92 ,237 ,82,2 
4 

57 DRTR "12319' 

58 DRTR 32, a©5, 163, 253, 237, 91, 
75 .92 , 42 .89 ,92.357, <i».S4,38, 215, 
205 , 154 , SS3 , 42 . 1£ 1 , 92 . 245 , 126 , 21 
1,66, 241, 42, 120,^2,24. 21, 205,153 
,253,42, 178,92.24,15,206,153,233 
, 42 , 73 . 92 . 205 , 1 1 C , PR , ns 6s . 3* ,33 

,i.&45,2i6,2a6 1?^, 2^3,1,2*. iia, 

206 , 105 , asi , 1 , :S6 , ass ,i0§ , l4l , 23 
3, 1,246, 255, 20s, 106, 853,1,255 ,25 
5,205. 103 ,253,253,243.1,110.412,3 
iW^b©, 8 , 9i , 254 , 70, 40 , 176, 254 ,®i, 
20^-10 

59 Dft"Pl •■ 13363" 

60 DR-A 255, ;9S, 66, 252, 253, 33, 
36,«£,iia!»,ii4I,2Sl,207,a55, -75,5, 
60,56,252,237,66,61. 198,48 229,2 
05, 131, 2Sd, 33, 249,91,52,42 249, « 
1,205, 144, 253, 22s, 201, 837, ?S,S4, 
9&,3e,Q ill, 11,41,41 ,29, ^;jb,ai«l, 
6,8 , 26 , 1 19 , 36 , 19 , 16 . 250 , 20 : , 21S . 
36 ,805 , 72 ,34,249 ,91 .33 , 6,0 ,201 ,6 
2, 5, 50, 106,9^,62, 56.62,57,42, 6^. 
1 , £ i 1 , 234 ,6e , is , 5© , 14 1 , 92 , 30 , 72 . 
92 ,2li , 127, a6s , 107 , 13 ,62 




61 DflTh* "Lie48" 

62 DATR 2. aeS.l, 22,201, 206, 188 
,253,62,68,215,62,58.215,239,160 

,C0,S05, i4a,a,i£3 .iisi, £55 ,32,2*8 
, aas, K.2 ,2 , 32 ,251 , 22 ,0 , 205 , 33 , 3 , 
48,24.4.254, 13, 40, 26, 254, 9e, 40,71 
, 264, 4^ , 56 , 324 , 234 , 56 . 48 , 220, 245 
,21S,2*l,20C,3*,4.C.e3*, 1,104,4., 1 
5 ,56, 2d ,206 , 205 , 16i , 45 , 56 ,38, 62 , 
32, 2LS ,62 , 6 1 , 215 , 62 , 32 . 215 , 837 . 6 
7,254.,^! ,S,*, 175.33,864.91,237, 1 

63 6flTR " 12264 ' 

64 DATP 48,10,215,15,238,62,13 
,216,24,154 207,5,198,7,24,842 1 
9S^l*a ,asi, SOS, 138,203,62, 72, a is 
,64,58,213,33 ,254,91, 64,0,35,5*, 
,805 , 142, 2 . 1^3 , 254 , fi6S , 32 ,848 . a 
05, 142, a, 32. 251, 22, 0,205, 30, 3, *a 

,244.254.13 40, 41 ,?S4 , 9ei , 4.0 , 238 , 
854, 48, 56, 2^4., 254., 71, 48. 220, 25*, 
58,56,4,234.65,66,212,245,215,24 
1,214,48,25^,10,56,2,214,7,33,25 
4 ,91.237 .11'. ,35,337, 111 ,34 

65 DP(TA ••12237 ' 

66 DPTR 1^1, 6.^,32, 215, 6a, 61, 21 
5,68.32, 215 , 237 , 75 .S51 , 4l , 205, 43 
,45,20E,a27^4S,62, 13,215 .24, 153, 
i/,S, 1,33,260,0,205, is I, 3,62,35, 
205, 15;, 2=3, 207 .*9. 62, 6 50, 1«6, 9 
2, 195, 66, 25^, 20s. 188, 5S5, 42, 118, 
92,235,33,177,92.66,75,269,213,2 
as, 43, 45, 2as,&2 7. 48 ,239^225,62,3 
2, 215, £6, 119, 43, 54, 0,206, 40, 25, 8 
2,32 216,62,32,213,26,6,2,175,23 
7,111,193,48,2S4,SS,43,^2 

17 OPTfii "liitlO 

58 DflTR ; 
2,32.215,2: 
s.ia 13,i 

,254 fe, 56, 84. 71, 197,33,0,3, I', 1, 
6,22^,505,181,3,285,17,16,0,167, 
237,82,32,240,193, 16,233,62,240, 
211,63,6,85 ,119, Vfe ,283,66 ,l4 . 211 
.63,6,55, 116,15,253,197,865,142, 
S , 193 , 33 ,32 , 39, 167 , 237 ,82,40,2,2 
4,189, 195.104,251 

e>Q (Sqrrp "loasi" 

100 SWE -TLKCODE 64360,1000 
102 PRlhT "Mazhine-COde nDw 3PU 

EO. Rre you jyre au the DftTP 

ACf ' ' -cnfrtirtt (ij/n) It not t 

hen Sflk« -.his •'''progfan tso!": 
INPUT :<\t 
164 IF qtcy Oft <^««"Y" T^EN GO 

960 STOP 
1000 LET LlNEaiS; PRltff RT 4,3; 
INiJERSE l,"f?ER(>ING OR~R ": PlilNT 

10U1 L>in atil0,5): Old SdOOG): 
L£" to0: LET wa0; UET xs64360: F 
OR Bi=l TO 1000 READ Urn): POKE 
X,S(ffl): LET t = :+S(l»): LET :<=>+! 

I0a» if n :■ 1 hno if«i00 or b/ioo*! 
NT (M/lOe) THEN CO 5UB 1088 
1010 NEXT a 
1030 GO TO 100 

lOBC LET LlNCoLlHC+S: LET «t»tt+l: 
PRIKT PRPER 2 LlNE,t; RERD i » (H 
); IP URL ajCw: <)T THEN PRINT "E 
i-fOf in l:nE ".LINE; STOP 
lO"*© LCT l-O. ftCTURN 
9000 STDP 
9999 RRSOOMIZE USR 54360 



Lis lino 2 

9990 RE^ TooU; I 

9992 CL£flR 64359 , , _.„ 

9934 LU-iO ILK-CCDE 64360 

9996 RR^JDOHIZE U5R 54360 



ctrrect ones. So it is aJvisjibk to Sav< the 
Bssic piogiani btfont trying the n.aL-liine 
cod«. Once the machine code wmks ;t4 
expected you can New the program, but 
mike sure first (hu machine cade is Saved. 
Nove." try to load the machinZ-eide be'ore 
lowering Ramtop - Clear 64359. 



Drums 

Stephen Pnyn0, 
tpswtch 

Tkis !'ROC;t?.V.M Kirrply playo a drxrni rhythm. 
Rcalis'tc .;ne::ts have been achici'ed by itang 
the Er.v commands. ■ 



W^^M 





Amstrad Drums. 

5 s=l 

JO druns »»•« S. Paine 4'H/8* 

IS MOLE 9 

20 CLE:LOCATe 8, 1 1 :PRINT 'DRUMS" 

SB ENT -1,1, 127.1,5,24,1 

*0 ENV 1 .1,15,1,5,-3,2 

50 ENV 2,15,-1,10 

fiV> FORI !■= I TO 4 

65 IF s>2 THEN s=l 

66 (F s=J THEN ch=l 

67 IF s-2 THEN ct»'«4 
70 FOR yl ro 3 

60 FOR 0=0 TO 1B8:N:XT o 
SB T0n=<t+4>#54 
ItdV) SOJNIJ ch,ton,6,a,l,l .1 
110 NEXT 



120 s=s+liHEXTich-5:s=l 
13P FOR t=B TO 90: NEXT 
140 SOUND 2,0,1^,13,2,0,1 

ise FOR ^^ I ro 3 

168 SOUND Ch,4a6,6. 15, 1 ,1 ,2 
I7C FUK 1:=M III J6«:NEXT 
ISe SOUND ch,?e0.6,0,l,l,2 
19C FOR t-0 TO IBOsNEXT 

2ie FOR t=B TO 1B0:NE<T 
22B SQUMJ ch,*a6,6,15,l,I ,2 
7.TP FOR t^B TO 3tOtNE<T 

2ie SQur>© ch,300,6,0,t ,1,2 

250 IF p<3 THEN -OR t=0 TO 360: NEXT 
?6C IF p=3 THEN ="0^ t=0 TO 24e:hEXT 
270 NEXT p 
.780 BOTO 62 



134 YDUR COMPUTER. FEBRUARY 1955 



INDEX 

Simon Rollins with an updated 
version of the YC index. The first 
digit after the reference refers to the 
volume number, the second to issue 
number and the third to the page on 
which the reference occurs. 



ACE 

Cili) go frt&ln, J, 5, 87 
Chiracicr f^3rminH, i. A, 83 

Oanics, sec UAMHS 

Music, % \i, m 

Piugiiiiit cliutdss 3,3, 131 

Progranvs 

Fimh tiw. 3, 2, );i 

Hottli surround. 3. 6, U9 

Millipede, i. 4, 141 

ACORN ATOM 

Accounts, 2, 12, 70 

Bjjii; vjinloisci, 3, 2, !H 

Copy runtlion, i, !, 117 

Oijawcnihln , I, 5, 50 

nriors, \ \ 107 

Fit: ha^dlina, 1, 8, 62 

(•orrh, 2, 10, -Jt 

Onphirs, 1, 2, 43 

in ;<Kiuilioa, I, 1, >3 

Line labcHins, 2, 4,45 

Mifiic, 2> 5, 51 

I'ctkxand Pokci, 1, 3, JS 

PliJlu^!up)liL' iincrptelulioil, 2, S, 32 

FkliiiiR power, 3, <■, 131 

rroKrummin^ om, Z, 2, 41 

Programming i*,'©, 1, 3,51 

Pnfftttna 

Ao>M) >iloi, 3, I, II I 

Acittn KonSi i. 7, ''2 

Aii^mlc space btiiie 1, ., SO 

Aiao ron ttipc badcr, 1,1, •>') 

Bit buiidit, :^, 12, 105 

Rlilj'krri?, 5. ■). 1-1! 

Cartoiti driwir^, 1, 1, 49 

Cfald'splnj, 1.2, (5 

C'kKiictxs dnpU,-, 2, 6, 76 

Cup)' r.iiii.'i uii, 3, I, II"* 

DnndlehuR, 2, ;, T. 

Ermrlix, 2, 12. lOS 

Fo'rh <onncc[icn. 3. 4. 149 

Gfitphim scurci:, 1, 1, 4? 

Informtiior, I, 1, W 

In the wcttfc, 2, 7, 90 

Kocp f (, 2, t. '2 

Kc^txurd scan, i, '1, bl 

K«y li> ulldtrisliitsding, /, 1,67 

Kcji fiction!, 2, '>, K3 

K« rojtint, 2, 9, ^0, 

l.3.'x\ lindcf, 2. lO.S'J 

Leist ^uurci:, J, 3,69 

LcMK l.ne, 2, 12, !(i9 
Mtchartical muiic, 2, 2, 68 
More in sicrc, 1, 4, 7ii 
Kc iiurslivns, ^, S, &3 
Rally racer, 3, S, 1 79 
Rtid a.id diu, 2, 4, 75 
R«l time doftk, 1. S, 7* 
Sqjash, 2, 11, I (14 
Sicck n«rk;i, 3, 9, 171 
SfrinRS and arnys, 1, 3, 71 
Siuiiiu.iiii, i, i, 131 
1'abuiation tcc^niqucs, 1 , 2, 66 
T^Jc ilifcctury, 2, <■, V5 
Tl-e hfwk, 2, 12, 101 
ThfouRh the mwe, 2, 2, 73 
Verse aid woi*;, 2, 7, £6 
Worm squirm, 3, 5, 1 6S 
\^'ort!b of ^iadtin, *, 8, S5 

Zen d'fippcr, J, 2, 7S 
QlcsI, 2, 12,62 
Sotjwjic siirvcj, li 4. 23 
SoJwa-c survcj, 2, 7, 32 
'I'exl and g'rtpliaci, 2, 10, fii 
Utility s?t, 2, 6, 46 
Wud ptoc<e«oi, 3, 1. 72 

Adventure ga.Ttc.s snivin)*, 3, V, 70 
Advctstute ^ani;5. si,ivc>, 3,9, 6S 
Adventure ;;3m?.«. wTitmc, j. v, >-i 
Afi«r 'J>« revclutian, 3, H, I SI 

AMSTK.\n f.l'r,JS<l 
Gimes sec GAMES 



Prop-ams 

Ligli biWj;, ', i:-, 1$} 

Aiom reicue, 5, ., 163 * 

Music). 12. M; 

RouJ:ttc.4, tl, IW 

Software $urv«>, 4, 11,59 

ttililie«i 

Muvc. 4. 12, 141 

Shape, diaw, and till, 5, 1, 17) 

Sm>nd cdiiur. 4. .0. 181 

Sprites, 5, 1, 145 

'K'ord proccixir, 4, 1 1, 122 

Ani:1cliil In'.cl1ii|cncc ((jcsiln); K^trac, 

i, 7, 64 

Artwork, !. 4. 33 

Asiniov — low :ci write i WiWd 

prr>r«<.nr, 2, 5, 65 

Asinttfv — i6 a <laiat-asc, 2, 8, 66 

ATAIll 

Aiiitniilii^u 4. 11, \Xf 

Chflnclcls, 3. I, 7S 

)-ine scfoJIifif, 3,5, 115 

Ganiis, sw l-AMES 

{ii)c:iupt>. 3, 12, 15S 

ProjratBs 

.\liei. wdv.., % 12 191 

Codt inwnci, 3, 2, 129 
Grafhic rccill, 2, II, IS 
Raitdotsi, jifiipliiti., 2, II. 101 
Kelor.itc Si-rcen, >, J, IIH 
SC3 (ON, }, 10, 191 
Sourd wfitor. J, 4, 144 

Spritt" Miiiir, 1, ^ M"! 
.Vmn itiixtiMC^., I, 7. 10* 
.^fiwarc suricy, 3, 2, 50 
Solivaicsurvcv, 1, 2,62 
litnt Tral, J,'o, 12a 

DaKfC diciioitarv 

AC, 2. JO. 59 

C-E,2, 11. yi 

21.2, 12,81 

I-.M, 3, I. 91 

M-P, \ i, 10S 

?-T, 3, :, 111 

non .ilphinitmcrif wntwis, 3, 4, 127 

Ron jlphinumcrir >yiit«uk, 3, 5, 151 

Riisiie st3iid.ir<l», I, I, % 

Raiiic trinsbtion 

one, 2, 4, 40 

two, 2, >, 61 

ihter, 2. 6, 13 

four, 2, :, fif' 

five, 2, 8> 58 

ux. i, % 01 

BBC 

\ la fTUvr, X % Vi 

AiTictiiblir. 3. 3, ?7 

Sisic V Comil, I. 4, 40 

Christmxs ca:uls, 3, 12, 128 

Coteuf OvcrUy, 5, 2, 89 

•xirvirol kcyS: 2, 10, f5 

Double i^cnsiiv disc fling systems, 5, 1, 

116 

Fort.i4, 1. 152 

•aincs, sec G.AMfi.S 

'.'Graphics, 2, 2, 23 

;;r.iphifi, 2, 4, 42 

Jir^ptiics, 2, 5, 5? 

BBC G(aphi.-.<i 1, -I, >, 146 , 

imC Grjph»:-s 2 (I'etspcttive & 

itercosctpic I'rnjccijrns) 4, 4, 15t 

UBC 

Hi aitstori one, 3, II, 193 

llcartitOT) fuiu, 3 12,202 

Hcattsto.:^ three, 1, 1, 16S 

HcartstoT foor. 4, 2, 155 

Hcaitstot) I'lvr, 4 3,-39 

ls.evjoa(il Ibi voar BUG (sec roittciiois 

S, io, 37) 4, 9, 70 

Mapploilcr 1,4 4, »8 

Mflp plftUT ' (+nrtir -t /niotr prntrr) 

4,5. 141 



iV.odei, 3, 4, 79 
.v;oniior{.\+f:), 3;3, »0(a:c 
cihait.TiMtiu J, 3,26) 
.V;O.S, 1, •■, 7; 
.Viusic(I.20S). 4, ;l. 109 
tmiire. I. 1,36 
Pxel -slottcr, 5,7, 127 
BBC Pju{;tuii!iniiij, 2, 6, j9 
Pmgranxs, 
Airuia&lj (A • J), 4, 7, 1^4 

Animjl m!pic(A + B), 3, 7, 154 
BKktcjt (A + 3), 4, 5, 164 
B;ilie <B). 4, 2, 178 
Hl»i;k;\ddcr {A + fi). 4. 5. 74 
Bliii(B), }, 1,114 
Komb:r (B), 3. 10, IS: 

Cartoon Tinw (B), 'i, (•, 91 
Oterpillai (BX 4, 1. l»3 
Chicki(B-, 4, II, 181 
Giun<A + B),2, 11, 109 
t olour and Scuntl (A + H), 2, 5, HI 
Coiiimi VvM (A +B). \, 3, !*«' 
ratah»sc!A + B), '. 6, 16'> 
te(xMt(t), 3 S, .76 
Held gun (A + B), 3. I. 110 
nishi of fancT (B>, 3,5, Vi 
Kou« II a row (A + B), 5, I. 170 
Function itraptis (B). t, ti. 1M> 
CrapJii« I (AtB). 4, 2, h6 
Craphics 2 (A* B). Perspective & 
Scrcrscor ic prmcdinrK. 4.4, 'ift 
i:idd<ii d«ptht (A>-B), 2. 10, ^3 
Itnilatinn Forth (A+B;, 1, 1, 152 
Lawnttover (3), 3, 4, 137 
Lciici pu^e 't3>, 3, II, 2<3 
l.ifccvclc(A*B), 3, 12, 2 7 
lissajjus ifTctt (AfB). 2, £ I, .09 

Map?kXUnu I (A+BX4. t. 9S 

Mrtp tlotiini; 2 (.A+ B)(+ Orie 4 oinu- 

;iriiii«r)4, 5, i41 

iMcmor>- display (A+B), 3, 4, :49 

i\K-:i»r'v toblvr (A I B), 2, 6, 70 

Mrtcors (.\ + K), 4. I, 182 

BBC Prt^rams, 

,\Viliiljn(A + .U 2, 5,8 1 

.Millipede (A 4 B), 3. 5. 16! 

.Mini syiiih (A+ »), 3,9, 155 

.Moiis: trip (E). 3, 8, 61 

•MultKOloar (B), 2, 7, }9 

Cthclo(.-'. + B), 3,9, 175 

Over tlw iKW I (A+B), 2, % V 

Paitein memory (.''i+B), 2, 10,91 

rswhic aitcrcids (A t- Bj, J, >, 1 24 

J'icasio's painbruih (B), 5 1, 166 

rrisiib (B|. 3, 2. 127 

Kate :h*i; (A4- B), 4. '.. IT? 

Scceeii to printer duiitp (Bi * Epson 

MX-MI (-"-T.;, 3, 137 

Se»bmle(A*B), 2, 9. 17 

^(uttiuln (AtB;. j, 7, )'.7 

Soft Vey (A » B), 2. 11. 104 

SMcetr's cajtlc (A ♦ % 2, 12, 99 

Sopt Thi:r (31, 4. lOi 169 

i9tumilaM(B),4, 7, 150 

.<!iuk3(n),4, J, 179 

Tape salvjgc -A » B), 2, 12, I OS 

TcUoti <<\* Ui. t, 12,66 

Test uf charattcr (A + .3), 2, 6, 67 

Tract (A -B). 3, 12,225 

Thret- D-terv-lan [A-rR). 2, H, IC3 

ThfcfD-iriai^le (A+B), 2, S, 81 

TvpcA-rittf (K), 3, 2, :22 

Vdt<«(A'-B). 3, 10, 99 

Vituet r«otl (A4-B), 2, 12. JU5 

Voyajer sicws (A *■ B), 2,>, 13 

Vt'ord pnxcs^ir (t), 2 8, "7 

BBC 

l'ro|tc«, !, 1 M> 

Soflviiin; r«\iews, 

Addo-i's (Relmfif.'g 4, 1 1, 153 

(jiminsi.-|-, 4, 6. 8S 

Hulk 4, n, i;ii 

ROM's. ^, 7, 59 

Software .4«ir\",y, ;, 10, 38 

Software surv:y, ?, '5, TO 

Suftiurc iUtviy, 3, 8, 52 

Software %tir\'iy, 4, 1,66 

foTtuaic iuiv;y s«tve,'", 4. 5. 78 

S>l'Iv^are M»r\;y, 4, 9, 60 

Software iUTS-*\'. 4, 1 1, 60 

Sounil(.\+B),2, 7, 4- 

founJ (A I B). 2. 12, '4 

Split* rtnin>aior ar.d dellittr, 4, 3, 14, 

Sprites, 3, 9, 97 

Spriift 1 (sec c«!fr;cti(ns 4, 7, 33) 4, 6. 

1211 

Sprites 2, 4, '., I IV 

Tes.li liqiics, 2, 8, 5<l 

TelelcKl <dil(ir, 2. 11,72 

Telsdt. 4, 12.66 

Tips, 2, ¥, 34 

TutiSc eriplii.-s (A + B), 3. I, 64 

BBC Ulriilics 

?I> f-rnp!> pra^rnm, 4, 4, 185 

Amolist [A'^B), J, 3, 136 

Bsckitp (l>i»c ii«i*). ?, S, 175 

Calc*eet. 3. II, .11 



Compaaor. 3, 8, 123 (s» c«ri«tioin 3, 

9,39) 

Dataoi.f, % I, 125 

I)i;!iss<mh1cr, ?, 3,90 

Drawing proKiim. 3, IC, 141 

Djnvats. 4. i. 193 

Ficd, i, 12, 2U1 

Joysticli uliiily. 4, 10, U9 

KtysiitK, 4, 10 140 

KtywiAiis, 4, ID, ITj 

.VSonitw, 3, 3, 90 (sec c.^hanccnieni 3, 5 

28i 

Masicd.aaS). 4, It, 109 

Pointpot, *, 6, 189 

Spwkr, 4, 5, 129 

Sprite rXnimato- & Dclncr, 4, 3, 114 

Sprittfu 1 (E*j*f ,:t>rrt;clxuii:; *. V, 33), -l, 6, 
124 

Sprites 2, ^, 7, 117 
Tape to ditc, 3 6, 141 
1 race, 3, 12, 225 
Vcriry, 4, i, ISa 
Vi'Hial screens, 4, '2, 115 
WorU (troemot, 4,9, 1 S4 
Kcok5 

.'Xwm business, I , i, 69 
.'\l9[|ii^ tlieury uid pi !«;.«;«, I, t, 69 
Ctstcwav Ruidcto ilie /.\«t)-Hl, I, *>, 
69 

Gctiinj; acquainted vvitl" vour Acorn 
AtJin. 1, 5. 69 

.Mastering iiuebine cude uiiyuu: 
ZX81J-SI, I, 5,69 
Video ■ coraput;;s, 1, 5.. 69 
Hivutdiii^ UII diruu)$l<, ■}, ^, 64 

CBM.S4 

64harbUies4. 10. 119 
File*. 4, 5, 84 
Gsincs sec GAM MS 
IRQ Iiiierutpts, 4, 5, 1J9 
Millie, 1, «, 91 
Misit^-I, 4, 9,80 
I'rograms 

iD Ciibcii 64, 4, 3. 175 
Bi.p cAcr, <!, 12, 1H5 
ClKk,4, 5, 17) 
Duck soup, 4, 2, 185 

I;T, 3, V, 177 
FiHUii'Jii krys, J, 12, 223 
HKc.s!)r,vv, 3, H,2n 
Kirate. 4, 1 1 , : 75 
Ktyftotrd. I, ij, i«9 
Pidntmi; tic Way, J, 13, 12) 
Saurii Paiol, t, 6, 1S6 
.Synth«!ii.sc[. 3,5, 175 
Soltwarc stttvcy, 3, 9, 60 
Software survey, 3, 12, 1 14 
Suftware suivc», 4, 4, 68 
Si)l'tvv;Kir %ui^C|r, 4, 6, 78 

Software sorve;, 4, 10, 64 

UiUltics 

64Barblu:s. 4. tO. IH 

.Atto rumK'r, 4, 4, 187 

Cci.a1n;^ic, 4, 1, 185 

Dti aisen'blef niunilor, 4, 13, 169 

Kwcnccd BASK":, ', 7, 127 

Fie-»u;er, 1, 4. 18'< 

Fies, 4, 5. 84 

Fvnctijn keys, 3, 12, 223 

Guitar plajer, 4, 6, 173 

Initrirj;. 4 9, .65 

Kfyboinl niidifl viawl, 4, 2, 197 

I.i t<> clcliUi, -I, 1, 2^1 

t.iitsnj; speed, 4, ?, 151 

MjcbtBJc ', 2, 145 

Memory ti.atiaBcr, i, 1, 13'/ 

xVleige LUimtuu il, 4, 7, na 

iVl.ivirip, sixites, 4, 5, U6 

i\Iu.siL64.4, 9 SO 

<)ei.-k loader. 4. 1 1, 78 

,^een save, 5, 1, 141 

Sfrilemiilrol, 4, 1?, 201 

.Sprite editor, 3, 10, I M 

TeolkR, 4, 1, 169 

Ckasbf; ^pccures with a Spectrum, 

3,5, 50 

Ckcss. 2. 2. 11 

Chess, 2, i, 26 

Cbess profirarr. wriinj;, 2, % 24 

Cbess survtv, 2, 1,26 

Cbi:M zXui i.l, I, 5,30 

Choviing a wurd prorvssor, 3, 7, 70 

Campctitions 

}9Sic3s Cver the iuclan Rive:, 3, 11, 

235 

V) Stcas solution. 4, 2, 201 

.•\Jve[i;ure cumpeii ion, 4, i, 72 

.•\Jvcnrijrc comperlion rcr.iiitr., 1, i, 181 

.•\BKi:aii CI'C-i64 conixiiiion, 4, 6, 77 

Aeistrad C,PC-t64 rcsii ts, 4, 9, 1 66 

.Aadro.d .Mutirv uii ihc Inlerjtalaciic 

H vesiiip, i, (s tyi 

.'Xadrod .Viutifv piobtcni sulv-ed, 3, 8, 

177 

(continued on ne>t page) 



YOUF COMPUTf R. FEfiRUARY 19fl5 tlS 



(continued iront previous page^ 

INDEX 

BiKi Catchtr, 2, 7, 93 

Kird (Jitclur rciulls 2, 1, "JJ 

Ru'sUTifi RiibhUi comprtition, 1. 1, >5 

Ru Miie Bubblts solutitii, 1, 2, 71 
Cai-fiy.lner, 2, 11, J] 3 
Cal-UKbter iolurion, i, I, 12! 
Chrlicinaj conif-eljinn, I, >, SI 
Cl)m(ii!«& cnmf-ctitun answers, ?, 2, 77 
Cnivv^Adati tomfMUticn, 4, 5, 139 
CoccoAd.Tu riMiii', i 7, i-*5 
Coinmoilnrt pli.s> t I'uttipmition, 't, 10, 
12S 

Cu^iiiiKKlun plus 4 results, 4, 1 2, 79 
Compcucioii uriliv Vvai, (1563), 4, t, 

19: 

Compclilinii of ihc Yenr. (1584), 4, 13, 

76 

Cntcr .<obots, !, 3, 77 

Ciittr Robots sniutijn, I, 5. 81 

Dciign Yoiii Ovii Mtc'o. 4, 1, 86 

l>iic Sifaiis- i, }, T 

Dire St',ii(<i solution, 2, 5. H" 

Rnip.mii CuJe, 2, 10 97 

Eni);nia Ctvdc M'lulivn, 2, 12, 111 

Kai. Gty. 5, 1, 70 

Godcn Nufgci, 2, (., 79 

Go!de!i Ku|:gi:i solu ion, 2, 8, fl7 

Uonvy Coirb, 1, 0, 181 

Hoiev (^ivb Hlulion, 1, 1 1, 23S 

Jail Drak, 2, 9, 98 

Jail Break solution, !, 91, 113 

KliiSKoa Dcadi, ii, 1. Si 

Kliiip.oc Dcuili Ansvcrs, 2, i, 79 

Mcmntffh Compclidwn, 4, ;, 171 

iVtriimtfi-h Ttiilt*., .4. ■>. lOi 

Orh Bomb. 3, 3. 1 30 

Oili Bwiib luluiion, 3, 4, 155 

CrcM^f;, 2, 1,73 

On.'.v Ely; s<>liil»>ii, 3, i, 75 

Fovcf C«b<, 2, 8, S7 

Povcr Cobc Solution, 2, 10, 97 

P^^ioii Otsat.iscr coirpeiiuoti, 4. '. Sf 

Ps.ion OfRanscr ii;stil>, 4, H, 2C'3 

QLcotapctitiim. 4, 4, id" 

Ql. norapciiiion resells, 1, 6. 160 

Bwioi :tiaajc, ;. 5, 07 

Rodent RiiUli' julution, 2, 7 93 

Son)- Ilil Bir compciition. 4, 11, 161 

Sonj- Hit Bit rttuhs, ?, , 113 

Mji :>icni:, }> 1, 121 

.Sl;li .SlLMitr >jlutiun, i, 3. 13* 

Sfi^nRc nnciiinie!, j, H, 177 

Sifonnc KncMiotor ccluiijii, ), 1{, 207 

■rcl;panic Dacxfefi, 3, \ 13) 

TcL-pmiic Danfcrs suluiian, 3, ^, 183 

Tlif HiilofllieTful. 3. 5, (83 

The Mall ot'tnt- I lu i ^uution, 3. 7, IJtl 

Tin PyrumiJdfARpar, ). 4, 1S5 

The Hvramid of Afjpir .%iU)i on, 3, 6 

111 

Trinary Tiihuluiion, 3, 7, 181 

Triiiarv Trihiilaiion xilu.ioTj, 3, 9, 1£1 

Trdt I'bqiu. 2, 2, 77 

Tiul! ritHin Su)uiio:i, Z, 4, A3 

Ttolb' Cave, 1 , 4. 79 

Trolls' Cave answers 2, 1, 7J 

Wondwarm, i. 10. 2D7 

WoddWMm ioiuion, 3, 12, 2ii 

Xmi<i RsK, 2, 12, 111 

Xiiits Bjx :i0iuii3n, 3, 3, 13C 

Con>pute> Ciic>» kurvty, 1, 2,24 
Computer Club Viti(!>, 

Ayltsbu-y, 2, 5, 19 
Ayksbury, 4, !, 61 
K'liiiingliutn, 3, 5, .35 
Carnbridf.c, 3, 12, 8V 
Cardinr, 3, 9, 49 
ChclKDhain, 3, :, 11 
Chilicrns, 4. 6, ^i 
r.rOA'biOugh, 4, 10,45 
Cro?dor, 2, I, 15 
t^rovdor, 3, 6, SI 
liasi Loadop, 2, 6, 17 
Eduraticnal Ustii' Group, 2, 3, 15 

Gu^?url 4, J, 5^ 

rmi dfoid, 4. 4, 55 

Gweni, ?, 7, 19 

H3iame:smith ard FiiUian, 4, 7, 43 

Liverpool, 1, 3, .1 

Marchcticr ~MC' 2, 8, 17 

Mecwav, 4, 12. ^7 

Milton Keyiw*. .'. If, l*J 

Korth Kent, 3, 7, 45 

North L>ndcn, 3, 4, 37 

Nonhan-ptorshitt:, 4, 5, 35 

Nuiutig Dak, 1, 1, 1? 

Mnttinph-tm, 3. 8, 49 

^rpit)gt(-n, 2, 4, 1 9 

.■)xford. 1,4. 17 

Peal; Districr, 3, 10, ii 

?oliiiciil Panics and CompuiiiR, \ 1, 51 



I'm^eik. 4.. 2, 53 
Richtnona, , '.;, 1 1 
ikiiiih<inipton, 3, 1 1, 19 
Southcnd-oryScj 4, 1 1 , 19 
Si I ji r<iril npnn A^^on . 4, ), 4 1 
.SutKin, 3, 1 , 65 
Taitgerinc Users Grxip, 2, 2, 15 
Thsmes Valev, 2, 1^ 2: 

\Vc;i UiiJi.1, 2, 9, 21 

WcM .\Vtilandi, i, 3. 37 

Woret^^tcr I'trk, 3, 2 33 

Computer control 

one. I, 2,\i 

two I, J, 50 

Ihfcr, 1,4, 52 

liMir, I, 5, 60 

five. 2, :, 5J 

>ix, 2, 2. 56 

wvcn, ?, 3. 56 

Computing afltr Cyclcncs. 4, 12, 164 

Corsult (he O.-jcIc, 1,3, 71 

Coctrol (rc\iew MPF I) 2, 12, S« 

CuEtrol 

One. 3, (,9* 

Twc, 3, 2. 108 

Design Vour O^n Micro results, 4, 

i, <i 

DRAGON 

Aninialiv, .1, h, l?7 

Anui, 2. 1 1,46 

Diwo liyhis ;scc ^rftaiflni 4, 1 1 40), 

J. 9. 85 

nio, 4,9, m 

l-ood, 3, 7, 122 

Koilb, 4, V, .41 

ftatrcs src G.'^.VIES 

'Jraphicf, 3, 2. 7t 

oraphi. ind :l3li^atcs, 4, 10, 135 

IIif<ti res colour paphict, 4, \ 122 

Mavliiiiv ctxj: on:, 3, 9, .26 

Machine <od.- tw), 3, 10, 161 

Madtiitt fod: thicc, 3, I . , 179 

Programs 

Utile; awr, J, 1, 113 

.Mir* >liiKil (.ut, 2, 1 1, 101 

Aninatni, 4, 7, 150 

\rii«, 3, 12, 226 

33t nop, 3, :, 121 

3MX RiJct,4, 9, 159 

lloc«, 1, 2, 187 

:3ubMcs J, •>, iui 

Bum. 4.4. 173 

Carnival, 4, lO, 179 

Camottuc, 3, 7, 161 

Casino, 4, 6, 179 

Djw:o lifiits fi« rorttvliau 4, 1 1, 40) 4, 

«. »; 

DuuBivr, 3, 7, 1 71 

Drcan irachnc. t, 4, 1 3f 

F.xtii cobuts, 3, 4, ISl 

Fireball. 3, \>\ .■>05 

Flor;l raiouiti, 3. 10, 194 

HciiiKciK, 4. I. 179 

HopJt, 4, 5, 169 

tUiiJ \>f LviiA>i\i-i }, 4, 148 

Lab>Tiivili, 3. 12, 209 

Lip 'ccoid, .3, 8, 161 

Maiiic ciiclc, 2, 11, 111 

.Mutii.v im, 4, 7, 155 

Mcimnotnc, 3, 9, 167 

Music micMt:), 3,4, .51 

Orbii«r, J, H, 21 S, 

rvtbon, -i, 2, 199 

Raid, 5, .. 1(9 

RattC trai. 3 10. 181 

nockit ccmmand. 3. :, 122 

Scranhlc, 3,?, If2 

Scicai sc-oll, 3, 1, 1 13 

Sharw. 3. I i..v.:»9 

Souni Knph, 3, 2. 133 

The rap, 3, 5, 181 

Timtclwk, 3, 6, 170 

Tmih el twn (sec C4rr«tiOia 4, 4, 45) 4, 

1 \SO 

Puzzle, 3, 9, 106 

Screen Kit. 3, 12. 173 

Software survey, 3, 4, 40 

Softwiirc survey. 4, 1, 70 

Sprilesi, 4, 4, 145 

SlulU(ii;(, 1, 4, r/4 

Utilities, 

.■■^r.inwior- 4, 6, 127 

CatahRUC, 3, 7. 1»! 

Coloui m.\, 4, 13 19" 

r-diror & »s*«BibIe:, 4, 5, MS 

hirth, 4, 7, 141 

Klc5, 1, C, 135 

Hash routine, 4, 9, 164 

Graphs $f Slalistict, 4, 10, 135 

i:igh re^ (olcai grjpliict, 4, 3. 133 

Key click, 3, S, 170 

Lowcrcast, 4, 1, 143 , 

.\lt:g:r, 3, 11.23: 

Unnr'nr t«vd ijiv»i«nblcr, 3, 5, 1 i> 

S:reen cdirnr, t, 7, 15? 

S;recii expander, ', 12, 13! 



Searcher, 4, }, 19) 

ioflkrj'^, 4, 2. 12* 

5l3tiaics, 4, 4, 174 

^Iore and scaich, 3, 8 1 3.^ 

Uiilitics, 1, 5. 17* 

Vort prcccssor, ^ 6, 1 34 

Educaticn, I, 5, 45 

- Mieic <qu:rts, 2, 5. 51 

— on tnc /..\tl, i, I, 35 

Ei.K(rrRON 

HaCK Adder, t, 5. 17' 

Software -cvicA-, -I, 1, 66 

F.lectrunie Keep Hit, (Aom), 2, 4, 72 

Cpronr and Fprom trascrs, 2, ', Ti 

First Bytes (Que<(lioii»), 

ASCII C«lti, 3, :-, 38 

All abou( Operato-s. X 5. 39 

('nakgue lo Jigii^, 5, 10, 55 

Aninulioa tcchnicuo, 4, ', 49 

Artifi.'ial mtcUincncc, I, 9, 37 

r:it ntipptd aueci», 4 6, ?l 

Eranchinf prcgrans, 5, 4, 38 

CliatK'lers pmtin; pr:uily, 3, 4, 38 

Chooitnn iov^ icks, 3, 10. 35 

Choosing a pnnict, 4, 7, 41 

Comparing diilbreric Ibsic?, 4, 2. 53 

Cointulci add ons, 4, 5, 49 

Control ckaracurs, J, 12, (5 

turwr kc;'*, 3, 4, 38 

Ijcbujgini, 4, 2, S3 

Diit operniop syscnw, 4, 6, 4) 

Privet : ptos iiHl oMis, 3, 1 1, 41 

CclUBK suried on msKhiiit code, 4. 7, 

M 

r-mphv-i, 4. 1, 59 

Heart of Siliccn, 3, 10. 53 

Hex n de:imiil corivefiion, 3, I, i9 

1:0 w ^perjtinx Jysienis iiikr »'*av tUc 

<|-iidg:f>'> '« '■ ••' 

How ckck errors, I, 3, 38 

How to drsigo line prcducc $iriciu'cd 

l»x»iir:n«. 4, 9. 37 

HoVL- to Mve ifuct. 3, 3, 4& 

Is a 32 bit better titan 16?, 4, 3, 51 

Kwiitp in. 3, 3, 3S 

lilt vithcut «*>iv 3, 10, '.3 

I^tcil Oieiiiiot^, 4, 4, 49 

iVachinc <ode, 3, 9, 45 

V.odem, t. 1,57 

Pokei. 3. », 54 

P-intcr coiipaiiMC, 4, 3, 51 

P-intinj: le the »cr<eii, 3, M, 83 

l'.-0|;r(.in fowehorti, 3, 9, 47 

P'ogrrtns tn ilic air, 5, 1, •'■" 

Pji a REM stitcitKnt n it. 3, 3, 3f 

R:soiutioii, 3. 7, 43 

K)b«i,4, 11,45 

Strctr m<3HK7, 4, 5, 49 

S<n»bk we* of home compiiten, 3 12, 

«3 

.Soitin', 3,12,83 

Space Mviij;, >. 7, 4S 

S|iagb<tii pro.iiram,', 4, I, 57 

SpcvTrjm t'UO'S, 4, 4, 51 

Speech jyr.thess-iccO(Hiti»n, i, 11, 47 

Snp and tmce, 3, 4, ii 

Stomsr. 3, 8. 46 

Stwag; nudium, 4 10, 4 3 

S(ruci«rc, 3, 8, 47 

Tw b«l Irome m«ro W gimcs pb'ing. 

4, 2, 'A 

The fne ^•l of ff^iftf, <ip the perfect 

chip,-;. 12, 55 

The uiieins of Basicod(. 4. 10, II 

The uiiitdofnicros, 3, ! I 59 

Uiir.s sub:ouii'.ci, 3, 9, 47 

Vrtttt CIVM d(«s, \ 9. 45 

VRmM tscocily 15 a fitC: 3, », S-l 

OTw irraji are for, 3, 7, 44 

DChat v. miehiiir cwle?, 3, 3, 3* 

What » a nenmry ni.i|!^, 3. 5, J8 

Which conpuier do 1 need?, 3, 3, JS 

Word irocrssitTg nukes it cisy, 4, 12, 5j 

Z«o e.Tors, 3, 6, 51 

FlaxtdUo 

Occ, Olhein (7.X8 ), 2,6, 32 

Tic, .\ntiipac. (VK), 2, 12, 25 

Hitchhiker (ZXSl), 3, 12, :5 

Sj^edKer (Spectrum), 2, 12. 25 

Plight Siniuliitors, 4, 12, 3$ 

F])w charting, 1,3, 32 

Fcrth for RAStG ii«f«. 3. 3, 6S 

From her; to reality, 4, 13, H2 

Ftlurc uf (he micro induiirv, 3, 12, 

125 

GAMliS 
Ace 

P3:-m«i Ttail. 3, 3. 68 

Amstrad 

Bcmbe-, 4, 10, 109 

SV Drop, 4, 9, 107 

Wir t>rcli<: VE'uniu, 5, I, 121 

Apple 
Nim, 2,4,48 



Atari 

BjUoots, 3, U, 187 

Bsti, ;. 10. 95 

BuR.si, 5, 115 

Chiihtn, ;;. 12 42 

King of iht Castle, 4, 10, 89 

iMwe .Viintr, 4, 3, 168 

Msnst^r .V.i;iei, 4.4. I08 

Svas, 4, K 12ft 

The t.iir (jee correctior.s 4, 4, 44) 4, 2, 

111) 

'rUc Woid Can*, ■•, 7, 97 

Time Tri.ils, 3- 6, 128 

lead, 3, 4, 76 

Wjrid Quil, 4, 6, 108 

.Aloni 

Quest, 2, 12, 6? 

BBC 

Avrnp/r (8), 4, t, 110 
BarkKanmon (A t E), 4, 9, 14 
Barricjdes, 3. ?, 78 (B - 1.2 0.5) 
nruktKroii>h(,\*B), J 5, «1 
Cutcfp.llar(R), ^, 1, 81 
Cramic Clah (B), 4, 3, 164 
Dirts (B), T, n, 148 

K.ntJfjM 'liip.^rinn {\ + B). 4 S, (id 

Frecw.T>> l-wg, I, 2. S6 [B) 
KnjitwKm (B), 3, 12, lil 
Games with Spriies,(B), 4, 7, 117 
OtidU ftnr^ («■, 4, 7, 104 
Gimie (BX 4.11, i\ 
Hciisc orCardi(A-B), 3, 5, 91 
Kri2V fohn IBl. 4. o. 1 13 
I.o.-ina Rescue (B), 4, ICl, 7fi 
.Miize.Vlunchcr(B), 2, 13, 58 
Ro.-krt.'!iciteii(B). J, 1(, tai 
Scijoitlcr (A < ri), :, 8, 90 

i>nikc3 & Ladders (R — ;>ee cur;ccci»n3 

for i.20,S 3 8, 40), 3, 6 11 

Siiwpv(B), 3. .1, 145 

.*kloarci (B), 4, 1, 116 

Sl*Ttck(A + F!), 3. 7, •>4 

CBM.(4 

Aiteriol Lflndxf.. '., 3. 151 

Asirodwdgc, 4, 3, 159 

Bil. HaSacwisun, *, 12, 125 

Bu l:oc. (see cnr cctiaiii 4, 12, 4£), 4, 9, 

1 US 

C»vc» oi Mars, 4, 6. 98 
<3otniic Qi%erTD, 4, 11, 100 
rijTi <yi>m, 3. 12. IS8 
Flight 44, 4, 2, 79 
Fltght Simulaio-, 4, 5, 89 
He I, 3. II, 139 
JciKt jrlly, 4, 10, SJ 
Pyiimid ofOooni, 'i, 1, 114 
i;n;pni;n, 4, 4, 109 
TrtMuic ofZaeorskv 1,4, 3. 77 
Tr(it$u:e ufZafjirskv 2,4, 4, 164 
\X'r.f.p.ly, 4, 7. *» 
DRAGON 32 

Cod\u>, 4, V, H6 

Cufsc tS Atu iinibet, 4, 1 1, 1 15 (see 

cor'eciijn* >, 1,41) 

DiiiRccii, 3, 11. \\t 

lixplorer, 3, 10, 100 

Flight Simiitato:, 3, 6, 8'i 

Frceger, 3, 7. 84 

F.«e»y,4. 3. 12J 

Gnsshe- Mi/e, 3, 8,71 

GoJ»blei, 4, 5, 101 

Hcils B:ils,4, 9, 104 

Ir.tcrccpor, 4, 2, 94 

Kait, 4,6, 142 

Ma^ifioti, 3, 3, frl 

miJO. J. I, hi 

Nightmjrc Holiday, 2, 12, 44 
Relouiii, 3, 4, 64 
Rcver^i, S, I, 1C3 
Siiany, 4, 7, 90 

Sky Shield, 3, 12, 135 («e correaion 4, 

2 44) 
farkj. 3. 5, 58 

Tarks, 4, It', IflO (srt ocrreaioni 4, 12, 

48) 

Tht Wall, 4. I, 111 

MZaOK 

Coup d'etic, 2, 12, 18, 

t Ching 1. I, 30 

Trcisur< Hcu«. 2. '., 30 

Oris 

Cetaepodi, >, 8, 100 

Dcs roytr, 4, 7, 1 14 

Doiman, 5, 1)9' 

Frojscr 3, ">, 87 

Iiividen, 3, 11, I23(sce«)rj:ctiRn5 3, 

12, 77) 

Kri'-V .'^pc (ice correLUUAS 4, 5, 42), 4, 

3, 137 

LanJcr i48K), 4,4, 91 

iVV,i<l )uinp«t {iet eorrccTMns 1, 10, 37), 

4, 9. 90 

Matri-t Hun, 3, 10, 129 

Smah (»ee correctiors 4, 9, 33), 4, 5, 

no 

Snai^e, 3, 7, 121 

The Brood, 4, 1., 9i (sec Enhancement 



136 ^OUR COMPUTER FEBRUARY 1985 



% 1,4'.) 

Trek •!, '3, If J 

^'arlock's Mtunliin (iSk) 4, Z, 116 

PI-T 

Doniinocs, 2, 2, Ji 

Mazt Aiiack, 2, ?, 30 

Spc«(r»i;n 

Aliquid Simplex, 4, 11, 84 

3alkinis, 3, 9, 76 (s« clarification >, Id, 

*?) 

ilcckman, 4, I, IJO 

3!iic^paii>u 4, 10 84 

Ciipmnn. \ id. ,■« 

Cosna;:iii|>s, 1. 3., 157 

CiTOj, 3, 1, 56 

Dangerous Gurdoiii (t8kj, 4, "', 75 

DcaJi Ditl, >, -1 Rft 

Dnonan (sec cnircciions 4, 3. 45), 4, 2, 

i2 

Kiiatii SimuUior, 2, 12. 3S (itc 

cnhanL-eiici'.l 3, 1, 27) 

SAaK^oi:; 3, . I, 134 

Miuui- (limhcr, 4, 9, HH 

WindklJ, 5, 6, 72 

I'onpo, 4, ft, yi), 

Qiji:inuiao, 3, 12, 1:2 

Salitn I ni'.dcr, 3, "S, 70 

ScrjiibUr, 4- 5, SO 

Spate t»adci$, 5, I , J 1 

Spaw QiiesU 1i !. 121 

SubBiari.ie liuel, 3, JO, 133 

Subniariic Mission, }, S, 108 

The Ucan:>iulk {mc t'lictrcioiii 4, 9, 33}. 

4, i, iOO 
Tiniciliccr. i, B, M 

uro's, 4,"i:, 135 

/i-hhrdy. 4, i, 1S6 

VlC-20 

Bitiikoiu, 3, 12, ift 

CaiKombs, 2, IC, 56 

DuiJiliuvcKi, Z. % -12 

Ocarh Trap i + i4K wp;iB!>io:i), 5. 1. 93 

Dotjiiglii, 1,5, 9S 

Oiiv-k Sl-ont. 2, P, 42 

filcv.itnn, 4, 11,93 

Frutifier, 3, 5, 62 

Goir, 3, % ')} 

Critlnwniu, 3, K, iOj 

let-Man (wc cRnccrion* 4, 9, 33), 4, ?, 

82 

Lab/tinih, 4, 4, 133 

Ladders, 1, \ >)i 

Lxiw rtop{ + 8K cipamioni, 4, 1, 132 

Mnrs, 2, fi, -O 

Miltipoui; ( '3b txpaiiioB ■— tee 

COrr.'CiicTO 4, 4, 45), 4, i, S\ 

Minoiaur, 3, 2, 64 

NiRM l->ifM, 3, 10, 150 

KIK1I Kaccf. 2, ll>, -14 

R;illv 2t. 4.2, l.H) 

Robi)l Ailucl. 4, y, (6, 

SAS- .•Wii!;li. 3, 13. aCi 

.S.iiKcf Atracfc, 3, 8, M (sec cirrcctiom, 

3, 9. 39: 

Scrain-2:>, 3, 6, 6A (tK xtii 16K jwntrii 

set .uijt^tiu.ti 3. 7, 10) 

Sinwii f:hnllfne<, 2, 7, 51 

Sna«, 1, 4, 60 

Space Runner. 3, 1. 54 

Tank UjuIc, 2, 5, 34 

Tlu- Guardian, 4, t, 1 17 

TujJ!i, \, il, 128 

Ti.i:k <"h.iM, t, 10, "»« 

Trcisur': ol'Xai;orskr 1, J, 3, 77 

Trci%ur< of Zasorsky 2, 4, 4, 164 

Vjcnian ( + 8K cipansiom, 4, 1, 94 

ZXSl 

1 K Giinws, 3, 6. 1 02 

Asttroii.5, 5. 1, 37 

H-5I Member, a. 9, SO 

Barrel Earraue (isc a>ricciii>rs 4, 11,41) 

4, f.. <>J 

HitMils isee rofrfCliccis 4, <J, 32) 4, 7,87 
IJU); UurM, 4, ll<, 1U4 
Cube .V.asicr, 2, 2, 16 («e cofrcdion* 2, 
4, 15) 

r>«ul> Duel, i, «, 68 

Oecp .SpcC; 3, I, tVO 

Demon Domain 2, i, 36 

nigger +UiK cxpaasior), 4. 12, 155 

Do* Rai-e, 2, f, 40 

Hro^gor, 3, 1, fi: (s*c correciious 3, 3, 

2fl) 

l-'roesie -I. Z 82 

Galaxoi^s 4. 5. .01 

Griund Strike. 3, 4.84 

Hifh R:s Hive, 4, fi, 103 

Ijici Eucl, 4, 4, 94 

Lit*, 3, !, 75 {ste ctrrecions 3, 3, 2?) 

.Munchman, 3, (I, 145 

Mm. 2, 4, 4S 

Ol^eilo 2. 6, 3: 

PAO-SI, 4, 3, 8? 

Pmball, 2, 10, 46 

I'iatc .^nrK>ving, 1,1, 0'.' 



Piobf, 2, 12. 52 

Rul .XiKS, 4, 11, 163 

Sciamfil, 3, 11, i:6 and 3 12, 191 [yx 

cofrtcuons 3, u, ii) 

Sca-mincs, 3, 'J, 134 (xe ainirmltieiils 3. 

1C,47) 

SraU*- & ladders. 2, 3, 37 

Sf-acc Invaders, 3, 7. 6< 

StWusit, >, 5, 78 

Gamts of strategy, 1. 5, M 

0>init> wriliiL);, % fi, 140 

Games wriiing pjicl^ r«*tew;<l. }, 4. 

77 

Genie 

.^loiilir invndcfs, 1, 4, i8 

RiMc vommand^, 1, 4, 71 

C;ii-siuarcd, 2, 2, 71 

Inxara cxtculsjn, 1, 1,74 

Kjv use, 2, 4, 80 («e corrcctioas 2, ft, 

15) 

Multiple r:f;pon)ic> 2, 9, 95 
I'trmaations, 2, S 81 
Stlttn,:; mtmot)" siic, 1. 2., 36 
SurtJiii^ (i^pUv, 2, ),ri2 

TRSR:! cnnps-'ibil tv, I, 4. 71' 

rinititj;, 2, 3.41 

tllsiory of softwat^: 1, 3,4. 122 

HJstorj' of software 2, 3, 'i. 112 

Kuw t-r.iikic gctt to llolywood, 4, v, 

7i 

Iinaf;:ne — Whai was th: name i>f 

iKc (>amc? 4. U. VV 

lit the Wikc jf Clirijtmas, ^l, 3, M8 

Ittcredibtc xhrinktni; compuicr, 3, 3, 

70 

[nror:ii»(.uii ^^riipliici, 2,7, :i 

liitclUecnt lypcuTiter (Atum), 2.. 9.<7 

liiter.-icwft 

Arora I. 3, 30 

jVcorn, 2, ■;, 3< 

.^nic a>n>'.)uiiag, ^, 5, 2$ 

BBC. 2. 3, 24 

Ittir.brie, J, 8, 10 

Coiiw,OtlceC, 1, I, 20 

Oon'.noJiirc, 2, 4, 28 

Govctiiititiu, I, 5, 28 

(jiiveiiinidit, 1, 1, 24 

>{itch4i)ktn; guide to ilic Oalaxy, 2, 10. 

42 

Nwcfm, I, 2, 30 

Ciic"; Nes.- Wivve, 5, 1. fiR 

Sm-Lir, 1, 2, 2(1 

<;:nci:ir, 2, H. 3S 

Spccfum, 2, ', 5* 

lanficrinc, 1,4, 21 

ZX8i 2, 6, 36 

J niiri'krK. . 3. 24 

Kit llutldinf;. 1, 1,40 

Lani^iagc learning 

Dragon. 3, 3, 100 

/XHI (itkK), }, 3, 100 

Made B.iw, 1 4, «! 

Ia«cr DI<cit,4, 12,92 

lynx Pr«Erwn& 

V.O}i. S|>in, 3. 4, 152 

DataXuriKe, 3. 7 17^ 

Ncvvdi:i>r!iii<n, 3, 6, 187 

lK.i r..in«, ■>, fl, 70 

Machine cod« baslci, 2, I, Kl 

6S02 Mathinc cede 

one. 5,4, !0J 

tn-u. 3, 5, I3J 

thsec. 3, t, 153 

four, 3, 7. 143 

Pvc, 3, 8. 143 

sx. 3, y. 141 

Mctnulecli memory. 4, 3, 9^ 

Microtaii pricraRWt 

>;ull inj <..uv!>, 1, 3, >U 

Kcadng Spccl, 2. 6, -3 

Kcsisaor Fmdfi, 2, 5, 79 

stuiu. ni;pi»». y. ^, M 

Jvmtiolic Values, 1, 2 66 
ModeniK, 3, 9, 133 
Modems, 3, 10, 16« 
MoOcm Cower, 4, 6 $1 
Monitor! 

r.m«'!.r..iid:, 4, 12,S4 
Fvpljin,-a, 4. I ■>. 84 
MSX Invaders. >, 3,68 
MSX Rc%icw, 4, 11,62 
.MSN SuppUtiient 
UiHi.irw — r'.'j.'J jiid MSX, (jige 12 
.Software Rev ew-s. paiCS 6 and 18 
The .VliJX St')ry w fa:, psge 4 
i'hc Sam: but DilTeteriu pajei 8 and < 
Music 

AT.iri, !, 4, 2* 
iiZSOK, 1.5, 36 
■U/Xtilt, 1, 4, 26 
TRSSO, ,5,36 
VIC. 1,', 26 
?.X8I, 1,4, ;6 
.Vlus.c hardwire, 4, 9. 65 
.^^us c sofiwafe. i. 9. 77 
MZfOK 



PnjgriiilS 
Arav sort, 3, 1, ll> 
Brtakoai, 2, 10. 89 
CaftI skarp. 1, 5, 7' 
Deep siacc attack, 2, 6, 7 i 
Donoi) at iJic wivcc , 1 , 5, 73 
iVUmoij' to screen, 1. 3. 71 
Patcal .'uricuuni, 2, 1 1, 105 
Rood nnncf, 1. 2, 67 
Shirp brealoul 2, .0, t9 
•Jhltp b.ntj, 2, tl, «i 
Sk;ichpaU 2, 10. W 
Test tinuT, 2, .^, .S5 
Otic j^aphics, 3, o, 106 
ProKrams 

Ai» p«ir Oric,4. t, 197 
Bombei, 4, 1, 194 
C«*mk rVidpcf, -I, HI, 177 
I.ij>hthkes,4, I, IfiO 
Mnelidd, 4, 6 ISS 
Mowr, 3, 12, 215 
Misic, 4, I, IL'b 
Oig3nt>,i(ictt, 3. 5, 167 
Pwamjniac. 4.9. 159 
Si.fti Hile, 3, .2. :25 
Span Hopxt, 4, 5. 172 
Si^hiiai, 4, II. 1H; 
S>Ttihe4iM:r, 3, 11, 215 
Son ware »ur\cy, J, M, 72 
Software iur%cy, 4. 2, 64 
SFrilev, 1. 12. 109 
Ulilitie!^ 
Anis!,4.. 2, I8-) 
Auiop:usc, 4, 1, 2UI 
Bxkup, 4, 6, 183 
DHtKoitikr, }, U, 1 13 
Giaphtt« dimp, 4, 1, 2tl3 
P;iiiil nxiti^c, 4, 12, 2117 
Ptniirar, kadct. 5, I, 174 
KiliuiTibcr, 3, *, 179 
Rtnuisbc.', 4, '■', 1 :6 
RtMrt, 4, \\ U6 

Rc-vc( (oniinl, t, t, J 74 

Sffeen heretic;, 3, 7, 177 

S]:riies,4, 12. 109 

ir-iiiitts, 4. 10 12f 

Virify, 3, 0. Ill 

Wordt word.t wotd)( (Reviewei), 4, 10, 

155 

Pwcal for bcfslnnar*. 3, tO, fO 

Peck and PoLe oi th: ZX80, 1, I, 39 

P«l 

Giiiie; see G.'V.VIRS 

fior.rams, Uritue !■«> far, 2. 7, 45 

Ci-M ibc Kunct, 2, 5, 85 (»« ccrrwtions 

2, 7. 15) 

I /utnr/ iMtiilrc, ?, ft. >l* 

.Mongipt (akt.laio-, 1,4, 68 

Pivinf a .\iori.?ase 1, >, 74 

.Mulliplicr cilc;t, 2, 6, 75 

ronie;s unw, !, 3, o9 

Sitceii piiat. 2, 1, 69 

•Spacciife, 2, L 69 

Pickine a Miero. 2. 10, 74 

i'.racy, 4, 1 1, 73 

P.ollinK 

B3C, .>. 11,2! 

l)«,.f.o». 3. n,22 

Speciniin. 2, 11, 21 

P)rtahlc con-put:ri, 2, 64 56 

I'fcsitl uduplora, I, «, 93 

Pfinltrs uiuler £»00, 'i, 1, 73 

Pro|!ran« for the ZXflO, 2, 7 60 

Q». 

6E(K»8 Au:ntl>lcr Ijiorial, !, I, 155 

Program 

(}uidiuplei$, 4, tl. 195 
Utilities 

l>i.sj.vEmhtcr, 4, J:, 113 
SpooUr, 4, 12, 177 
Tract- 5, I, 167 

'SiR'X^vn.i, 12. MS 

Quc«l Corner (adver.ture programs 

rcx'icwcdt 

.'XinMnid KciuMi to Ed<n, 5, I, 67 

.■Van '..ores of Time, 4, i, vt 

S.'!0«tall.4, 3,61 

BBC. :3 Plinth OoH, 4, 7, 19 

nnr l K nnrl-ur. ATKimit, 4, i, 6,\ 

BBC 3 Ltgioa. 4, 5, 59 
BBC 3 Lcrdsof Tiir.c. 4, i, 59 
BBC 3 Ptttieiew"! Dijiy. 4. 6, 61 
BBf. 3 Reium lu P-ilca, 7, I, CT 

BBC 3 The Coun. 4, U. 55 

BBC ,4 Tic V^hccl of Fnnjnc, 5. ;. 67 

BBC 3 Wood'ahd Terror. !. ID. 5 

BBC «-i74[d'$ClMllci¥,e (.^ + 1-). 4. 9, 

4? 

CBMfi4 

MxMt 4, I, 5, 50 

Cangtr nwnse in the Black Foicst 

Chateau, 5, I, 67 

l!ejoci olKam, 4, 4, 51 

lx)fdso! TinK, 4, ^, W 

.MuuRtjin Puttee ad^'eoiurc, 4, 12, 63 

nib Qiics , 4, 6, 61 

PcTum to Eden, 5. 1, S7 



Snovbaii, 1, 3, 61 

Streets. <y' l.4"iidon, 4, 3, 61 

nragon 32 

Pet! grevs Ciarv 4. S, 61 

Orte 

Psyto II, 4, 3, 6. 

Winiioi ( 18K), 4, 7, 4<* 

Spectrum 

Cjsile Ulackaa: t4SK), 4, 9, 47 

Clasic Adventure (48K), 4, >. 49 

CuJdkaClSK). 5. L67 

Oiiiir.t'r VtotNc in the Black Forest 

Cha;eau (4SK), t. 1,67 

Plig:u from :hc l)arit(4«S), 4, VL 63 

Grojnd Zero (48K). 4, 10, 5! 

Hull ( ISK), 4, 10, 31 

Ice St.iti.m zero, 5, I, 67 

MaJ Mjiih; II (ISK), ■'., 3, (i 

Mystcrtous Faircrouod (48KX 4, 11, 55 

Par.dox (48K.). 4. 9, 47 

Quest Iw ih' Hrly arail(4HK), '-, 6, 61 

KoU'n Hodi t4«K), I, 11. 5^ 

The Kev loTinK (4.JK), 4, 12, 63 

tleaching tor ibc Sky, 4, 12, 9(1 

.•\,xiTii I'lncimn, 3, 9 56 
.'\dwncc B6A, 4, 5, *6 
Alp^wironic, 4, ;, 7(1 
Amjtrai! CrC-4«4, 4, % 69 
Annum; Ct<:-'l<i4, 4, 6, 70 
Aqi.ariii"i I, 3, 7, 58 
.Am:ajiu.v II, 4, 4, 64 
.Ataii persoRui ccinputcr, I, I, 17 
Atari 600X1., 3, 11,72 
Atari 8C0XL, 4, 1, 72 

OBC JJ>J SltCIrim srjphien cilttLrA, l, 
1, 16 

nnc Btipisv, 3. 4, 50 
BIK: Miiro, 2. 1, It- 
BBC Spccct wmhcsis, 3. 6, 58 
Cainputers l.yii>, 3, 2, 42 
Vhiw. ni.ich ncs and pronranw, 2, 3, 26 

Cnl;i:o .\dtlitt, 1; 2, <)8 

Col)ur licnc, 2, 1(1, 34 

Col-jur irmcr, 1, 3, 44 

Coritnodoie64,2, 10, 34 

Conmndrtfc 16. 4, II), 54 

Cor.modure t'lus 4,4, 13, 52 

Com,x35, 3, 8, 56 

l>it.:%, i, i, ii 

Tin^wx 32, 2, 6 20 

DrupoR 64, 4, I 70 

Grandstand Tular, J, 10; 64 

Jupiter Ace, 1 , 11 , 28 

Lov C(w Prtnttrs, 2, 1 1, 32 

Lynx Uft, 4, t, 76 

.Mrnotcch .VlTX.5(a 3. 11,68 

.Microtan 65, I, 3, 45 

.MiJwich .MC, 2. 9. 76 

MIF- 1.2, l:i, 91 

Mri' II, 7., m, 2a 

iVUSX Compuiets, 4, 11,62 

M.SX bvadrcs, 1, 3 68 

Nascon- Raifc. 2, 3. 2U 

Ncwbrain, 1, 9. 36 

OiL. 3, 2, 16 

Ori;: Aimos, 4, 3, 64 

Oric V ^pKv'trutB, 3, 3, 40 

I'ri-iiers. 3, 12, 106 

Psi-m OrKaniscr, 4, :>, 5"" 

QL, 4, 6, 61 

<JI , \. 7, 52 

.S.-»rvo PHC lanje, 2. 10, 24 

Sl(;rp .MZ-'(M), 3, 7, 52 

Sinclair Spectrum, ;, 6, 20 

.Sord .\1-5, 2, i;, 26 

Sptctrav'ido, 3, 1 1, 76 

.Sptctruni aid un's, 3, 2- 5ij 

Sptctruni aiscnd^icri and mflnittirs, 1, 5, 

50 

Sprrtrnin .Wa«* .^tota^e. DcViCCS, 5, I, 53 

Spcctrvim Microdrive, 3. 9, >2 

Taidy CGP 1 1 5 Colwir nriiuer, 1, 3, 

44 

Tandy Coli»ur cuiiipuier, 1,3, 12 

Taadv Colour II, 4. 5, 72 

■faidy MC-10, 3, 13,6* 

Ta uuE Eirsteiti. 4, 9. ^ 

'l«a.i99-4, 1,4, 16 

Tctas CC-4, Comptci Compute", 3, 5, 

42 

Tcict, 3, 4, 56 

Tt»liiu.( H:<-ia,4,9, 4!l 

VIi'^-SC 1 2 12 

VIC add o'lf i, :, 4, 20 

VIC add on'si, i, 1,40 

VIC m;mo;y c?paii>ioit unils, 2 8, 26 

Viileo jamcs ni.ichinc<<, I, 5. 20 

Vtt^Bhi CSS.U, 1, 13,72 

ZX81,1, 1, 12 

ZXSl idd ins, 2, 9. 22 

ZXSl roloar heard, 2, 7, 2fi 

/.X.si '-O ports, 2, 4, 12 

ZXSl fceyt»ardi, 2, 6, ;8 

(continued on naxf paga} 



vriiinr.nviPHTFR ffbruary i<«ft 



ia? 



(nr.ntittifcf front previous pigo) 

INDEX 

ZXjiriorcr, 1, % 21 

Setond h^ind micros, 4, 7, 71} 

Servicing your iX printer, 4, 3, 91 



SOHTWAFE SHORTLIST (including 

KturchiLrt), 

Air.slmcl 

Country Co'ragts, 4, 12, 61 

liltviro Freddv, }, 10, IT 

Ocms o: ^IfJl'ui 4, ». 41 

RvUtiil In Time, 4, II, 53 

Stat AvciigtT, 'I, 12, Sy 

Stat Cn-nmnndo 4. 1 1.. S'l 

Sultan'* Maw. 4, 11, 5 J 

Zen AsKDiblcr. 5, 1,63 

Atari 

Al. RaM n, 4, 5, ¥4 

Cir.iiva Massicif , ■!, 7, 45 

Hro^gcr. 4, <i, ST 

Ore At tick. 3. 9 51 

Qix. ^, i, 51 

Qubert, 4. fi, 57 

BBC 737 F.lght Simulitor, 3. 12, 8'J 

BBC 3D Orand I'li.i, 3, 1, 'j't 

HBC 3Dee}: Spjcc, J, 1.,$' 

BnCKl.Q,5. ),6S 

BBC .•\%iatoi, 4, 6, 59 

BKt: « Harfige, 3, 13, S* 

BBC BCro!kii,4, 6 55 

BBC BtliyjuCipcn^, 5, 1,99 

UnC n tJan-hiiMvi.,, ■), 1, 47 

BBC B oalaxy R.iidti^, 4. iO, 4'; 

BBC B KnoA' Yjur ?in.Q, 5, 1, tl 

BBC B Mr lie, ^ 1.61 

KM. B JUIl.lOiU J, lU, 59 

BBC B Dhli.-ioii. 4, 5. S' 

BBCB Jspicv, I, i;, 5S 

KKC K l'i-n£wyr. .i, t -i" 

BBC B Pinball Arcade, 3, 1 1, ft7 

BBC « ieu loit, 3, 10, 59 

nnC n vnbnd, 1. K, 49 

niJC 11 >fal^cl^c St.im|u-i!i-, 4, ft. iV 

BBC K -Jtockcar. 4. 7, 4^ 

BBC B L<nc:c Cmidc, 4. 10,47 

BBC B l«)l-x. '.. 4,57 

BBC n J'.alaR.i, -1. ?, 58 

BBC Bwst, 4, 12, 59 

BBC l-f<n7v. 4, 7, 4' 

BBC .M:cpi>j.-o-l,4, 12, 01 

BBC T! u DiiiHi: Game, 4, 2. 61 

RBCTfolbffii, 3, 12,S9 

<;bm-6« 

Aiic.pilul, 4, 11,51 
Rate. Tiiitc. 4, 7. 45 
BqiiIc of MiilwsT, I, 11,51 
Baulc i)-rou$h Titnt, 5, ,61 
Beach Ileaa, 4, 5, 57 
Bonder Dsis I, 4, 12, 59 
BOZOS ^lf;hl Out, 4, t, 45 
Cslifom a <ii)d Kush, J, 1 1,<17 
CItiacse )ut^t,lcr. 4, 5, 55 
City AtTifk, 4. 5, 5S 
Cosmic Bounce, 4, 5. 57 
Craiy Civeuiaii, 4, I. fi5 
Danzinc Fca:s, 4, 3, 38 
Dcii|!nct'ii r;r.ci., 1, 1, 05 
Oinkv i:o, 4, 5, 55 
Drttoi, i, I,<i3 
biioouiu.':. 4. 7, 45 
Esp»n»(;e, 5, 1,59 
Bveie^i Amcii, 4, 1,63 
Rvil Dcari, 4. 9, J3 
Firs; Aoi, 4, 5, S! 
TihOit BjJtCis, 5: I, 57 
Hax'jc, :, 1, 57 
Hich NCOH, 1, ID, 4'.' 
Intcrdicix IMoi, 4, 11, 5! 
Interview, 5, 1 , f 3 
Jnmmii), 4. b, 57 
Vloropn E, 3. 8, 51 
Mt Xuboi, 4 L2. 59 
Vliiif. .Viacliiiw, 3, I., 67 
N'«p unc's Diur,l'tcf&, 4, 4, S* 
facnanii, 5, \,iS 
P.C. Fuiz, 5. l,il 
?i\ W.iriii)r, 5. 1. 59 

■Icv^ngetirthe Mutant Cyok-S, 4. 3, 

57 

Talts of the •Vrabian Kiii^his. 4, 9, 4: 

I cnonsi, 4, lU, 19 
rt.ippcr 5, ., 51 
Tiiihii 61, 1, 12, 61 
ntrhynlk. -t. I. rl 

Commodore 1£ 

Euitka, 4. 12, 61 
Dragon 32 

JD Si-jl: v;»in, I. % 57 
Kuzurd Bait, 4, 7, 4*' 
Cyrus Ciess, 3, .2, S9 



Glaxvoiti, 4. 2, 6. 

Giid-untt?f, J, 8. 51 

tlorKc ij'WX Skiinr., 1, 9, 13 

[ntcn;,ila(tic roi«, 4, !, 65 

MbMou XKI, 4,7, 47 

Kom Sei Oil, 4, 5, 55 

PedM, 4, 6, '7 

Kcd Vlcaiics, 4, 7, 45 

Sharl Trijuurc, 4, 1 , 63 

Snow Qutcn, 5, I, 57 

Spa« Radcn, 4, 2, 61 

l^tni JHUkiiivt, 3, 9, S] 

^.larj^tc, 4, 5 57 

itorn Arrowj., 3, 11, 67 

'.'ubc Wav Attnv, 4, », 47 

UGH, 4,2, tl ■ 

Elcc:ron 

Kno* Ynir Psi-Q, 5, 1. 61 

I'ongn'yii J. 4, 5, 

The l)ain| Oanx, 4, 2, 61 

Oric 

Clas3C Rtciiij (4S^K), 4. 9, 45 

rircrasli, 4, IZ, V> 

Onv.tar (48K), 4, 9, 45 

l.ost m a >»c<, 4, 5, 5t 

Slyv. S, 1 AT 
The l?iiu <4fK), 3, 12, 8» 
. roiiilc in .<;»it', 5, I, 65 
Xcncn, 3 S, 51 
Spcanim 

,',d .Vmij (48K), 4, 6, 55 
Air rninV C«nl«-1, 4 10, 49 
Alcalraz Harr.- (4SK), 4. 9, 43 
.'.metican l-'octbai: (4ftK), 4, 1 ., 5> 
Am .^ttaA (4iK), 3. 11,67 
.'.tK- At* (48K>, 4, 2, 59 
,».T.n.A.V5., -;, 1 y; 
LUckpackcrs Guidt to the Unircrx, 5, I, 
57 

Eitlv Bluebottle, 4. 10. 49 
Flui- Tliuitae: (48K), 4. 4, 57 
l=.if.atHW l48K>, 3, 12,59 
liuUnu, -i. 4. 59 
CmwiIK, 1, 10, 47 
Chcq.!crcd Ibf. (48K). 3, 12, «1 
(>)iiildowi) li iMdldoA-tf (18K), 4, It, 
53 

Crusoe {■iiK}, 4, •, 45 
Cyelcnc (48K|, 5, 1, 99 
Cyr«: IS :^hc», 3 8, 5! 

IViK rv Mucliiiiu ;4Kk), -i, 11,51 
l>cH>ndark.v R:vcn.'.r (48K', 5, 1, 65 
Dyslaia KiMt (43K), 4, 4, Si 
I-urclj (4<K), 4, 12, 61 
hil! Ouv ;4«K), 1, 1. il 
Pif.ht'r I'ik* (48K), 4, J, 59 
lied :48K), 4. 4, 59 
Can2ii«rs(4H"C). '.1.63 
Ondiunncr, 4, 1, 5) 
( loudtu (48K), 3,12,9) 
I'.K.R.O 4.11, 51 
1 artier .\ t*i.4, 1, 10, ■!<» 
l;aunicii Hcdj(c», 3, ID, 55 
Fick/cddSK), 4.4, 57 
I'm in Shtixk, 4, 1. 65 
Joinpn' Jick, 3, fi, 51 
Kniphr D-ivci, 4,6, 5* 
KiuRkt Lore, 5, 1, 55 
iai<i Siuwi (idK), 4, i, if 
ljtcr.varr (4SK), I, 6, 55 
lj>dc Runner :48K), 5. 1 (5 
IjDfds 01' .'.Itdiighl, 4, 9, 45 
iMdSic .Mmr.iiir. <48Ki, 3, 8, 51 
M;iiii{ .Miller, 3, 9,5 I 
hi»7.i:cs, V, 9, 51 
Micrtlwl, 4, t, 50 
Nij-ht fiunncr (48X>, 4, 6, 55 
Olviiuiiinnia, 4, 5, 57 
Pitmsn Srtcd. 3. 10, 59 
I'ist, J, 8, 11 

Rnval Birkdait <48K), 1, 2. 59 
Ron fur Gold (48K>, 5, 1,55 
SftiKiOivr (13KK4. J. 57 
Snowman {4hR), 4, 4, 57 
Sorcciy ( 15K), 4, 5, 5'. 
Space Station Ubrs (4SK), 4, ;, 59 
Siiuiiiluiii Du; (4HK), 5, 1, i) 
.Siitwtiiiit Sliikc (48K), 4, 6, '.~ 
TerroJacl'I (4^K), 3, 9. 51 
Ihc .Mairi.- Rciindihoit (ISK),4, !2. 61 
Tomh ot Draoila (4fiK), 4, 2, 59 
Tnmaio Uw Lcvd (4iK), 4, 10, 47 
Travel wiili Trashmar. (48K.}, *, 1, 57 

Tutanllhilaviiil ( t8K), 4, 1,63 

Ciideivi-uilde <4KK), 5, 1, 43 

Irbar UfuHan (481C), 4, 2,61 

Vilky le 17 (4iiK), 5, 1, 59 

WhUL- l.ieluiiiiK f'8K:, 4, iO, 17 

WM *'«t H^To (1.5KX i, 12. S9 

Z»mt>.e Zombie f'-BKj, 5, I. 6J 

VIC-20 

,\ ieii ( f 8!<. ui 1611 cxparKion): 3, 10, 

5« 

Adrafif;hltr^, 4, 3. 58 

Ciicha Snitchi, i, «, "il 

C^-niipcdc. 4, 3, 57 

Difctjicr. 4. 3* 57 



[>alr«ver, 1, ;, 59 

Fii;hr0I5. 4, 1,6} 

Guiin-bl, 4, 6. 59 

Jrt Pa: {+8K ;xpaision), 4, 2,61 

A^.aze (Jolil, 4,9, -l? 

A'.utart H.'fd, 4, 7. 47 

Ptycho Stwpp<r (^8K or 16K 

rtpaiiMiui), 4, >, Jt 

Space Joutu 4,2,41 

Siarship Ixcap; { + 16K expansion), 4, 4, 

5« 

Svbm^nnc Commmder, i, % ">! 

Ttiik C^itiniirdcrC+SK eipaitiion}, 4, 

7.45 

ZK81 

F»nv Kinir, 4, 6, 59 

S«a Vtolf, 4, 6. 59 

Stund, 2,11,50 

S*und 

Atom. 2, 11, 53 

BBC, 2, II. 5f 

SiKTCtrjin. 2, II. 5* 

Speaking tongucj, 3, 10, 77 

.Spectnini Hnimation, 3, 4, 111 (sx 

etcrectwns 3. ', .'.•'<) 

Br«nl<!n|; and I^ntcring, 4, I 1, V4 

Complex sounds, 3, '-., 1 17 
CiHr<vtcrs, 3,2,98 
SPi:<n-Rl).\5 
D spla*-, 4. 3, 50 
Daw, 4, 6, 135 
Forth, 4, 159 

OunM ««• <'jA.VlES 

Graph cs, 2, 7, 24 

Intern pis. 3, 6. 102 

.Microdri« Fik 1, t, I. 90 

.\5kt(i<Illvt l':k 2, 4, I I4> 

.\5ier(Klri« Fik 3. 1,2 Ui 

Mictodtive Kit 4, 4, 5, 135 

.Vlicfo^rivr Filr 5, J, 6. 14'! 

,\5itToirivt File 6, 1.9, 131 

.VUilti; K^.utiitaing (>cc cOTKCiions 4, 5, 

43), 4, 4, 103 

MuUitukiiiK — ^Kviiuiii iiieiiupi), 4, 

II, 147 

.\Ui$i<. .Maler, 4, 2, I2( 

.\tii^:<ra).V»:ir, 1. I, 189 

ProKratnti 

AMocd U.ii*,tr«,4, \ I«7 

Atkact, 4, 5, 165 

KlxV Mitt, i, >, U2 

Biicks, 5. ■?., .309 

Biidftc builder, 3. 12.218 

B>tc IranHirr, J, H. 2JI 

Chuii)ter», 4, 12, 135 

Chaiactet Oeiitrstto;, 2, 10, 9-t 

Cfrriders (f Ftat, >, i, 121 (see 

clxiiicilinn 3, >, M) 

Detective, 5, S, 157 

DiKkirg (4»K), 4. ♦, 171 

».n«s1. 9 161 

DKpla)r«, Ji, .'., i;;8 

lX«nKliur<h, 4, 1 , 1 77 

lh<i.i)\< Hachi, 2, 1, 111 

Kr>m Rrai \. i. HI 

Fjt Hole. ), 17.223 

Fast laid«r(!ieecor-ectixi» 4, 3,45)4, 

2, 195 

life t.. J, :, '>, 1 77 

Fwh. 4, I. 15* 

F«ilt.5, in: 

FreqtictKv Aiialvser, 4. 10. 166 

Giblct 3, II. ^05 

Gdi; 2,9.96 

OratTiti, J, 12. i31 

^Or^rh rintiir, \ 11. 2I« 

Giipc Cure, 2, 12, tOI 

niQ S«Kvi. 4, 10. 73 

Hwd Unci, 4. II, 197 

lltitof.ianvs 5. i, 1*2 

Infiani Conm.-iiii, J, 9, 171 

Inicrrux - lnl:rcc->t, 1. 3, 129 

Junpbsft, i,^4, 173 

Kiip Koii^ 3, 10, ;77 

IxirniBf. Tree, 4, 7, I5J 

Lifter, I, 3 17' 

Lijm Cvck, % 1, IftS 

.V5;«, J, 1 !, 209 

.Virtii MackitK, 3, to, ;03 

Vlnitipicjlwi, i, 2 1.2S 

Nrt Cmrip^le. 3, 2, 12) 

Oivrga lr.vider«, 1,7, 15 J 

Pa<-mai Ttail, >, 9. 91 

ranter. 4. 11, 170 

Hfir^t .md Vaiiipiic, 4, 10, 163 

Proton rimiiit, 4, 12, 2>4 

Oisv-k Charge, ). 6. 18'. 

Rc-ersi. ?, ft, 1»3 

RlHihicix. t, 9, 145 

51) Roiatoi 5, ', SO (4SK oAncts s« 

(.uiiCLiuiih 1, «, 41 ami }. 9, SO] 

31) Rotator — laiprtved, 4, 12, JS 

Scioli Coloars, 2, 10, 84 

Srfiwnl, 3, I, 124 

Shtepdufi, % 1.163 

Shawdcvi'n. 4, 10, 176 

Slaom.a, II, 103 



SlKk .liow, J, , U«9 

Siikkiiis.li. J, 6, 179 

Sp:cc Chaw, 3, 4, 133 

Starus, 3, 3. I 3* 

Strange Pat erns, 2, 12, 109 

Sub —Attack, :, i;, 97 

Telbot'i. 4, .2, (-6 (j:c c«rre<lioni 5, I, 

tiy 

TralTic Control, 4, '. H9 

Tu«wirs, 1, 9, 151 

WocdkUkr, 3, 8, 175 

Widlite, 3,8, 165 

Wintov. 4, 12, 101 

Wiidos, 5, I, 131 

Wordvcirch. 4, I, fM 

I>studospr.ies4, 1, 106 
RO.Vl, i, 1 93 

.Scrceti C.oinpiietor, 4, 10, I 31 
Software sarvty, J, 9, 2d 
Soliware iurvey 3, 1, 50 
Sofwait survey 3, i, 62 
Sof. w~dn: surx-cy, 3, I I. fi2 
Sof WiUiT survey. 4, J, 7t' 
.Sof tt-arr Mirvcy. 4, >, 74 
Sol waii survey: 4, 7, 5f 

Su/v«ji,: siiivty- 4. 10, (2 
Sot'wyi-.' survey 4, 12, (4 
Sound, 2. f., if, 
Sound, 2. II. 5» 
Soisnd, 3. 5 54 
Speech, 2. ll.M) 
Tchoft, 4, 12, o(j 
Toclkit, ^, 2, 77 

The Veicc of the Spec;ruin, 3, 0, 109 

Utilities 

.•\«.:nihli'r, 2. 10. 7/ («« coiTCCCiOlU 2, 

II, n) 

jVs»:mbicr (»ee aorrcriions 4, 1, 53), 3, 

11, 159 

Auk> Um! MjRiberin;!, 3, 13, 236 

Brcik PisaHe. 1, 6. '189 

Ch:ract:r Generator. 2, 10, '4 

Ch:raci.-r P.itwt + ZX P-inier), 4, 10. 

11) 

Clotie (:ee ortcccinrs 4, 2, 15), 4, I, 

203 

CoI)uf r.h30j>c. 4. 1. 194 

<'onp;nto!. 5, II, 229 

Definer 3, •, l(.2 

DisiSKBiblcr. 2,9,62 

Draw, 4, ft, !5) 

Etii or. 3, 6, 95 (sec eometicni 3, 7, 40) 

P-xrarwl-d H.1MC, 4. 9. 141 

F.xunded Bimc. 4. 7. 133 

Ext a tools, 3, 5 Ifi. 

Furctroi K.tys, 4, 4. 18* 

G:'.vlii<. Aid, 3, 1. 117 

?I)Or.i>h ri«i«i. >, I1,2U 

litres . 'Clover, 3 3, 133 

Kcywofi, 4,6. 87 

.Vlu.tiprjKranmmK (icc <or;ck;(ioa!t 4. 5, 

4 3). 4.- , 103 

.Muiie Maker. 4. 2. 120 

■Wuiicnnker, 4, 1, 149 

Puiai R'tuiinc (3^*c Ci>rr%.'ainiii *!, 11, t2) 

3, 10, ll"* 

Pro^raiT. Scmnc , 4, 7, 157 

P$eudoipriics (ste cnrreciiom 4, 3, 44) 4, 

I, luo 

Qui.'kluaU (sec corrcittoiu 4, 6, 43) 4. 5, 

119 

RrrumKi-r, \ 8, 70 

Renumlerir.j, 3, 1, 119 

Screen t:om?act«f, 1, 10 13 

Sciten Dump, 1, 12, ^31 

.S!w4c Copy ( » fMplni.oir priitcr;, 4, 12, 

192 

Speech Svnt'iesii, 4, 2, 175 

Tape Ilickup. 4.4. 185 

T:>]v F>uitii ter, 3, 5, 176 

Tew Crmprrit^icii, 4. 9, 125 

Toolkit ;sce comcticnx 4, 5, 42) 4, 4, 

151 

Ttatcr, 3. 9, «3 

Tfa^sfoiin, 4, 4, 191 

Tri-pixcl Plfttcr. 4. 3, \i\ 

t'DJ'S. 4, ?, 154 

L'sc- DclmcJ Keys, 3, 10, l«6 

Va:iu!>te List, 4, 5, 167 

VliV I'.. 5, 1, 1/2 

Wiixlos, 4, 12, 101 

Zoon, ;. H W 

Variables, 5, 5, 135 

Word proccsiior, J, 5, S4 

Tangcrne Menibership, I. I, 9 

Teljort,4, 12, 66 ard 5, I, 79 

"i'antri ^flnpint, 1.2. 17 

ThcEkn Story, 4, t, 7S 

The Splril af niri!>linH<i to Come. 3, 

12, 121 



The rest of the index 
wilt foe published noKt 
month. 



1.38 YOUR COMPUTER FEBRUARY 1385 



EXPEraENCE 




FEATURING SUPERB 'BATTLEZONE' ACTION! 



Warl Gir Draxon, Supreme Overlord of the 
Arcturan Empire, has declared war or. the Terrar 
Empire, prompting Earth s leaders to dispatch *iie 
entire Terran Fleet to intercept the Arcturan Armada. 
With the fleet half-way to Arctunjs. Terran Intelli- 
gence discovered the existence of the Warplink, a 
phenomenon permitting the transfer of matter 
S ^_^ from one spot to another. 

^^^***^^s;s5,j^^^^ ' • Ciir Draxon was 



an entire ground a.s5wult force to Titan, Saturn's largest 
satellite, as the prelude to a massive invasion of the 
now-unprotected Earth. Earth's only remaining hope is 
the RAVEM, an experimental armoured craft equipoed 
wfth anti-grav pods, an inviso-cloak, and heavy 
weaponry. You must pilot the craft through ttie seven 
Warplirksfronh Arcturus to Titan, destroying the 
guardposts on the \vay, in order tb clear a path for the 
rfetum of Earth's forces. A suicide mission? Or Earth s 
only hope? --^ 



■ gU tesdina cornpuensforesmcTuJi i.g Pj^^^M^BI^WnKiMrrw WILDINGS WOOtMORJM 

tnrormation on how to become a U.S. Gold Stockist write to: 

CentreSoft, Unit 10, The Parkway industrial Centre, 
Hcncagc Street, Birmingham B7 4LY. Telephone: 021 359 3020. Telex: 337268. 




Available spectrum 48k £6.95 commodore 64 £7.95 

NOW for AMSTRADCPC464 S7.95 



SOFTWARE STAR is the NEW 
game from Kevin Toms. v&\o 
designed the Software Classic - 
FOOTBALL MANAGER. 
SOFTWARE STAR altows yoa lu 
try your hand at running a 
succDGsfut software acnpany. Yolj 
have to cope with staff problems, 



game launches, advertising, 
financal problems and more while 
trying to produce chart 
topping successlui games. 
One other thing, SOFTWARE 
STAR has that gripping 
Addictive quality that all 
Kevin's gamies have! 



^ 





NOWAVVULABLE IS|M|,yOUR COMPUTER! 





by KEVIN TOMS 



"Absoibingandreatistic - Highly recommended" - Sunday Times. February 1964 
"Cotnpletety fantastic - I want one!" - ChartbN'cholas. Arsenal sriker in Big K,AprJt584 




--^";v:,'oi^'YA 



KtViNTONB 



Some outsSandlng features ol the game 

• TraTSfcrmar1<ei • Promolbn and relegation 

• FA. Cup matches • Injury proti!«ins » Full league tatiles 

• Four Di/isions • PCk >ourowr team tcr eich natcn 

• As many seasons as you Ike • Kfenagerial rating 

• 7sViintvel« • Save gameaciity • FmancTal martpufaiiors 

• You can fwenhR )iaokt»rii 



NEED WE SAY MORE 






FOOTBALL !VIANA( 

ii flvi^^ilpbleforthefolbwiig 
computars:- 

AMSTRADCPD454 

COMMODORE G^ 


3ER 

. £7.95 
. £7.9G 
. £6.95 
, £7,95 
. £7,95 
. £7,95 
...£5,95 
. £5.95 
. £5.95 


SPECTRUM 48K 

ELECTRON 

BBC MODEL B 


ORIC48K&ATMOS 

DRAGON 

ZX8I 16K 

VIC?0-f16K 


(500n for M??X) 



Available from 



WHSiVflTH$i and '^d 



I (selected titles) 




In case of difficulty buy by msti order. 

Send Checues/PO.s to:- 

ADD13TIVE GAMtS 

7a Rbfimond Hiil, Bournemottfi, Dorset BH26HE. 



J^^^° 



^v 



BBC MICRO 

- USER SUPPORT - 



10 ISSUES OF BEEBUG MAGAZINE MAILED FREE TO MEMBERS • 30 
EXCITING GAMES AND VISUAL PROGRAMS • 43 SOFTWARE REVIEWS • 33 
HARDWARE REVIEWS • 16 BOOK REVIEWS • 150 HINTS AND TIPS • 25 
APPUCATION PROGRAMS • SERIES OF ARTICLES FOR BEGINNERS • MANY 
ADVANCED TECHNICAL ARTICLES • NEWS AND PRODUCT INFORMATION 
• PLUS SPECIAL OFFERS • BIG DISCOUNTS ON A WIDE RANGE OF 
PRODUCTS • EVENTS • BRAIN TEASERS • LOCAL CLUBS • FULL 

MAGAZINE INDEX 

A TEARS SUBSCRIPTION WOULD HAVE BOUGHT YOU ALL THIS 

Figures based on the 10 issues of BEEBUG Volume 2. 

BUT IT'S NOT TOO LATE TO JOIN FOR VOLUME THREE 

BEEBUG PUBUCATIONS LTD PO BOX 109. HIGH W^'COMBE. BUCKS 

WJEASE ENBOX M& f(^jpWM£ 3 o* BEEBtTG At £ii.« (10 teSU^; BEEBUG HAS BEEN ESTABLISHED 
NAME FOR TWO YEARS AND NOW HAS 

' OVER 25,000 MEMBERS. IT OFFERS 

ADDRESS TOTAL USER SUPPORT to ALL BBC 

AMOUNT ENCLOSED MICRO USERS. 

PLEASE MiVEE CHEQUES MADE PAYABLE TO BEEBUG PUBLICATIONS LTD. 
AND SEND TO:- DEPT 4 PO BOX lOS, HIGH WYCOMBE. BUCKS. 
(DISTRIBUTION AGENTS FOR BEEBUG) 



Educational Software LCL 




^m^'- 



Msnmn 






BBC Micro 

ZX Spectrum 

Commodore 64 

Electron 

unexpanded Vic 

ZX81 

Apple 

PET 

Dragon (buuk unly) 

All software for the 

above computers. 



MICFO eUCLCH (BBC Elc^l'onl. C^mputo Inglisti Lsngiege 9e<<-tuiti*n 

tnd levlsoo couise. lo O-Levd. ol 2i pioftarm. liuludss "speak-and- 

spell" Inc em as itnuiitdl. £24.50. 

MICFO MATHS 14 piogrim rtvisiin ci set-luhlon coo so to Lev«l. 

£24. SO (.xcepT 2.X81 £12 00). 

P1CTJRE PUZZLES WITH LIGHT P£^ (BBC. Etecuen). {ductlkxial lests lor 

Jifanls, LSing IjgH pel to selict coloir 3C p>ctuie:. f6.50 CLigM P*n 

MS. 50). 

ANIMATED ARITHMETIC Teaches lislno innvino cnloii- pKtiiin!; Itwt 

worcfcl. Ages 3 8. £6.30 Idics t7.50). 

URAINTEASERS IBBC. Electron CBMG4. Spectrum. C(»g<»n, Vict Book of 

10 tusis and mtih prcflfons. O.Oi. 

■•£x£oller.l': EDUCATIONAL COUPJTINC. 

Immedate dispatch VSIcro Mcms. Micio Enylir.!. uni Msslof Maths. 
^ora or £«nc orders O' leQjesti (or free aatalodin 120^ |>i(.i)'a"sl ta- 

Withl htHlcfs in Ktiocaltavtl softwvtf 



LCL 



26 Avondale Ave. 
Staines, Middx. 
Tel: 0784- 58771 



Ate*M 




24 his. Orders 



TRADE. ENQURE 
ABOUT NEW L.NE 



•AS SffiN ON* 
T\' 




YOUR COViPUTER, FEBRUARY 1965 141 



fA1^iilSQ^ft^'jkbi%i 



Full Aerobatics 
5-pGmpf\\c5 





MicroProse Software 






-^ / 








- -//. 



, '. ' i'r'^-.x»w ■ V- 



f^f f- 



y.m 



~- 15 Strike Eagle 
ectures superb 3-D graphics, .^..j 
F-15 manceuyreabilify. epnpufdT(j 
assisted targeting including nf^f^^j^' 
fighter Heacs Op Display, aitbome raBf 
atr Id air missiles, surface to air missive 
defence, ground target bombing, full aero- 
batics, and multiple combat scenarios. 



DISK/CASSETTE 




£14.95i 



/-: 



A' 



»v« 




SOLO FUGHT: Tase off with this user friendly High! 
^illut<■lul whk.l>iiicluJc.-s3-C uraphlcs, luUizochpl 
instmrr.eniitior, duai VORs. ILS. 21 tliffsrert aioortj. 
an J real life challccyes Vorn wejiha jiiJ mechanical 
ui icftencoi. DISK/CASSETTE £14.95 

SPITRRE ACE: Save bandon during th€ Blilz in 
vouf (tA- Spitfire! Outstcnding oul-oi-th«-ttxkplt 
3D graphics; i'tdiffuniiit coiitiat tenafice. 
DISK £12.95, CASSETTE £$.95 

MATO COMMANDER; D-fenci Europ-; in an 
accelerated fei!Miri!<.;wjrsi.udtiDii! -uiiicrodirtg 
bijtllt;m<i|.. includes in'anta-, amnotir. 
telicoptets. airforces snd iHdical niclejr 
w*<ip:in<: niSKSISflS CAS.SFTTE£<».9i 




Cl.S. Gold is stocked by all leading 
computer stores Including: 



fj^ VAmvmwLi wHSMiTH wiLDifiGS wooumxmi 

U.S. Gold Limited, 'Jnil 10, Tlie Par-cway lidtstrial Centre, Herveage Street, Biimingham B7 4Ly. Telephone: 021-359 3020. Telex: 337268. 



SPECTRUM 

RAINBOW COPIA 

* QUITE SlMPL/ THE BEST BACK UP COPIER EVER FOR TH" 
SINCLAIR SPECTRLM 

* ALMOST ANY PROUBAM IS RtPKOJULtL) ON ULANK lA-'Lb 

• TESTED ON OVER 100 TOP GAMES WITH A 93% SUCCESS 
RATE 

♦ MULTPLE PART 3RCGRAMS BACKED UP IN OMC 60 
t ALSO BACKS-UP HEADER Lf SS PROGRAMS 

• FULL IMS'RUCTIONS WITH THIS EASY TO USE PROGRAM 

♦ THIS INCREDBLE MACHINE C03E PROGRAM IS EXC6UENT 
VALJb ^ tt>.9p incl. f-&f 



COMMODORE 64 

BRING YOUR 64 TO LIFE WITH 

LIGHTNING LOAD 

♦ CONVERTS ALMOST ALL YOUR FAv^OURITE SOFTWARE & 
GAMES INOT A SUPERFAET LOADING VERSION 

♦ YOUR CASSETTE PROGRAMS WILL INDEPENDENTLY .OAO 
FASTER TH^N THE CCMVODDRE DISC DRIV^FH 

* LIGHTNING LOAD HAS SOPHISTICATED FEATURES WHICH 
LEA'/E OUR COMPETITORS LIGHT YEARS BEHIND 

* COLOJR Ji SOUND ARE USED IM SPECTACULAR b UNIQUE 
WA^b lU fcNHANLt IHt fKUUHAM 

* 100% MACHINE CODE, FLEXIBLE MPtij SVSTFM ALLOWS 
SAVING OP MORE THAN iSK CONTINUOUS RAM 

• THIS AMA/ING PROi-SRAM IS NOW ON SPECIAL CFFER ('7.95 
MOW 16.95 incL P&P 



COPYCAT 

THE ULTIMATE BACKUP TAPE COPIER 

» MAKES BACK-UP COPIES 0- ALMCST ALL SOFTWARE 
»SPEC-ACULAR MULTICOLOURED LOAD AND SAVE 

• WIZARD AUDIO SOUND EFEEC-S 

♦ CASSETTE MAGtC SENSE 

* 100% MACHINE C03E 'AP£ COPItR V/lTH FLLL INSTPU^ tlONS 
(^CAN ^OL. FIND A BETTER COPIER' WE CAN'T' 

* SUPERS VALJE AT {5.95 ire. P&P 

DISPATCH OF THESE PROFESSIONAL PRDGRAVS V/ITHIN 14 

HOURS' 

CHEQUES/F.O.s TO; 

WIZARD SOFTWARE (Dept. YC) 
59 THE MAPLES, EXMOUTH, DEVON EX8 4NE 



O'LEVELS 

not just: revision but: also tuition 



WkTHS 



TOTAL 



fnaiOA, i^iAn Kou. teeirruli, ^avarii^tni, rwn, vu. 
•cimcv, bian, Mwmt, votuna. «*>«m. mutm ftim. 
ffl)M«,«Miita>«*^ptocliin.MnMtiitt. ' 
^ — ' ' ■ [. m a b i WIIi v, 



f, M i M rt K In*. 
Qitdfvtn. iiBBivtk ••dot. nnifiiiiiiWnil ftMMtFf, 



mrmet 



TOtAL 



Cnn't bw, tvc%, *«JB. 9atm parKltl, ■•rtruKft, Nit 
4di l*wi. «n*i7V f^rmi, tivcirri htm ktLrwIC «Mr|y, Wf- 
IKw. vtomic :tn>CTvv. radiitlcn. Mwpn.. Wwn nrt'ii't iMt. 



ftlCLWlY 



plint ord AninaJ alb, ynrtio. mhrtXMnm, rvfvpdutft^ 
ptotM>nit»«ii, dimoiu, tnnu^fTtnp, trvupor, barxrit 



COMP.ST. 

7 pMffWt 

TOTAL 

-4tk 



diti nltcticn, co<ln% itw*^, pr«amlng, pracimkui. 

csJ*. W*«n6kri, .rt*fpr(Url, tompttfn. Krr^n h pr^wn- 
ntnf, (dl B>d«»>j^ing.fmoax)0«.»l>»Ct>B«onw»g»»l>. 



Sfucnifn** j/i 


Docwo*! a 


/ 




-1 




Wimm«» 


' 


bscmmb ' 1 


ComwKriM 








J 


eecmMB 




CoimoiiMM 






SpKtrwnWk 


•/ 


BIICniiittllB 


J 



each subject only e7.35 inc p/p 



,, FORTH 
PASCAL Gi C 



3W 



0«1or {ic«cn Ddtto ] ana? 4$ (oqQ ri?9n« m»nu»l. S*H*l f 
ird lotdiif^ c1 »ou«its a i Ki«n editor ^u^>rtMV Tne* 
lacttil* 4n iWQiilta ti*r fti*V lution ind d«0M«|in9. 
jXnilvUliCv: "^Kvl n9». C niw, U90 twn, Fttth *iOn. 



tff^-mUO, 



B8Cm>«IB 



CennHd««d4 



each language only £5.55 inc. pfp 
GCE TUTORING DEPTc 

/O BR.MUERS H LL. ITICMIR £^0, HBH nYCOKSe, IUCKS. HI>IS «»<■ 
piMH tMMl mi: I my idnia ind aliKu. 



r ttnuw i i i ■!«! 



I m>damnliaa» •' PD. f« t. 




YOUR COMPJTER, FEBRUARY 19&5 143 



N^^ LOOKING FOR A HOME COMPUTER? « 

H^^ ALL ROADS LEAD TO @ 

MICRO POXA/ER 





mmm 







[u; 

Q 



< MEMOTECH MTX500 

^ MEMOTECH > ^ * 
MTX512 ► 



£Sf5: 





An excellant choice for both tJie 
beginner and the Spectrum owner 
wishing to upgrade. 

Festur«s; Z80A processor, SN76489A 

sound chip (the s»ne as in the BBC Mi 

256x192 graphics resolution, 16 colours. 32 sprles 

Iwo Alari-ly)>o j(jyslii;k purU, uunipu^ilv viiiou suuket. 

number pad. Sophisticated Jtilities to aid programming 
include built-in Assembler/Disassembler and monitor. 



\e260 

licro). V 



P^.'.r 



BBC MODEL B PLUS 

CASSETTE RECORDER . 

AND 5 MICRO POWER 

OR SELECTED ACORIMSOFT TAPES 



Features: 32 K BBC BASIC (the fastest on any home 
computer), 8 display modes, 16 colours, 640 x 256 high 
resoluticn graphics, 3 voice sound plus noise channel. 
RS423 and Centronics printer interfaces, joystick port 
built-in Assembler, 10 use- definable function keys 
Compteie \A/ith a 16 program cassette and 512 k 
page User Guide. .V'siN V 










© 




COM MODORE 64 

QSISCOMPATIBLE 
CASSETTE RECORDER 



Featufes: 64K, Microsoft BASIC. 
16 colours, 8 multi-coloured sprites, 
suunU i>yiitlit«si»tt( {yiutiuuiiiif llw bust 
sound on any micro], 320 x 200 graphics 
resolution, four function keys, two Atari-type joystick 
ports, cartridge slot, parallel prmter nte-tace. v-jNi'vn/I, 



SPECIAL 
OFFERf 




'AT 



ACORW ELECTRON PLUS 

CASSETTE RECORDER Off ^ 
5 MICRO POWER TAPES 



The scaled down version of the BBC Micro.' 
FentiirAs; BBC BASIC. 32K. 7 d splay modes 
{including 80 column text mode and 640 x 256 graphics 
resolution), 1G colours, 9 octave sound plus noise 
chonnol, built-in Aaacmblor. Complete with an 

introductory Cassette containing 16 programs, a User . . 

Guide, and a book: "Start Programming on the Electron". | ^] 



. £199 



rms3if!f 



^sd 



BLACK AND WHITE MONITOR 
C3] AMSTRAD CPC464 WITH 
COLOUR MONITOR 



[V^ heatures: built- n cassette recorder, 64K of memory, 27 

colours, BO column text mode, 640 x 200 graphics 
resolution, joysticks port, separate number pad. 



We also stock a wide range of monitors, disk 

drives, printers, joysticks, light pens, books, 

software and much more! Please send for our 

complete list. 



MAtL ORDER ADDRESS: 

DEPT YCl 

fVllCRO POWER LTD. 

SHEEPSCAR HOUSE 

SHEEPSCAR STREET SOUTH 

LEEDS L57 1M> 

TbI: (05321 4340C6 



SINCLAIR SPECTRUM 48K 

PLUS FREE 6-PACK ; 

SOFTWARE i 



;/^,\^J.\ 





PRICES CCRREH AT TIME 
CF GOING TO PRESS *Ll 
PRICES INCIU3VE OF VAT 
HIRE PURCHASE 
WAIIABLE muSi 
CONTACT US FOR FURIFfR 
DETAllS. CARRIAGE FREE 
F)R BBC AND MEMOTECH. 
AIL OTHER COVIPUTTRS 
£S.Oa VX WiNVtiO 
ONIY. 
AMPIE FREE PABKNG" 



SHOV/ROOM ADDRESS: 
MICRO POWER LTD. 
NORTHWOOD HOUSE 
NORTH STREET 
LEEDS LS7 2AA 
Tel: (05321 ttSaOO 





©ftDIcjiR)®®®®©®®®©®®®®^! 

Pfeaae ring for AvaUabtliTy 





ELB>HANT NEVER FORGETS 



Get the best from your computer with ELEPHANT disks. Certified 103% error-free and problem- 
fpse, and with quaaty maintained for at least 12 million passes, ELEPHAM" disks are 
guaranteed to Tmeet or exceed every industry standard and are compa'ible with virtually every 

computer on the market. 

Lcok for tjhe ELEPELANT sign at your local Dealers - or in case of difficulty, 
phone or write direct to Dennison Manufactunng Co L-jd. 




DsnnEson 




Dennison Maniifacturing Co. Ltd. 

CobnwJ Wi^.Witfoid. HsrtsWl)»4J/,l%i: WiUbnl(C923) 41244,Telex: 933321 

rrinef:Scfoc!fcss,6.SujKcni^aflct 921ISRosnySous8ou.TeI 16i I )e5S''3-70 

Germany: MarcomCoiniuta-zulehotr GntiH, Kocbieiikistr 3£1, 3000 lianao'/w 1, reiex 933818 

Otli er ComitritE : HAnn son Inumatiansl Co3ipa.-\y, 4QC6 BrlL-aUW , MaUiUas-Ctaudios-BU'a.iSG f , Te);:: A58 6600 





IWi 

n Please send me wur Iree talaloeus. 
Please send me: 
MSX BOOKS 

D VSX Games Book e6.95 

D "le Jom>lctt MS< PrcEranmes Ciide £14,95 

n V!SX Exposed C?.95 

COMMODORE 64 BOOKS 

IJ 5upetcliar£e Yaut Commodore 64 £5.95 

n r,nmmnf1irp U fiampt Rook 2 £fi.95 



Orders to: 

Metbouriie House Publisher; 

„ „ . ,., 39MiltonTradiig Estate 

D Com-nodorc £4 Scftv/are P Q)eds £6 95 Ahnednn. Oinn 0X14 4m 

□ Com irodKe 64 Gjmes Bock £5 95 

D Com™id.)fe £4 Scund & Graph cs £5.95 Coiresfondertce tO: 

nComT>cd>rce4E^=cd £6.9S gj^"""^^ 

C t>)m nodwe 64 MichJie Lingwge for tke rjJ„„„,„, ^i^gyp 

Absolute Begnne: EG.95 

BBC BOOKS Trade enquiries v/eloome. 

C GuidMoOBCROMs ..£395 

C Buildine Sloths fw BEC G»m« £^95 

U 8BCSoft»vaifPioiecls £6.35 — 

n 8BC BASIC fcrBegintijrs £7.35 ~ 

D BBC Hardware Prsjccli £&95 £ -^P^P -80 

Total 
QL BOOKS ^ 

O Ou.c* QL MachmE la>«ua«e £7.95 uH<Kiimm VAi .(.cr« appn^ 

Please include 30p(or (n$t and pack. 

telephoneil through an our 
24-kouransalone(D2Ii) S] 5DDI. 



li' 



I enclose my cheque/money orcer f)r £ 


Please debit m/ Access Carf N). 


i]q)i70ate 




Sigiature 


* 




Name 






Adcress 








^t:»de 


_W^12_ 


• 








\ 



E3 



BOURNE HOUSE ! 




MSX Games Book. Easy-to-cntcr piogmm lislings turn your 

M SX con puler into ar arcade of electronic fun and thrills. 
Games tc test your reflexes, lerve, log c, strategy and 
intelligerce Ttiis took will open the door fjr all fVSXowiers 
tea fascinatng new dimension C'f computer ganne act ion ard 
excitement. 

The Complete MSX Programmers Guice is in/aluabie for all 
MSX use's f'onfi novice tc advanced. It's four sections are: a 
conpehensive self-paced gjide fcr the beginner; b secticn 
dei/oted to advanced programming techniques; o detailed 
explanatonot both BASIC and -nachine language, anc a 
cOTipiete fic ide to the fvlSX Operat ng Systen. 

Tl"ie Complete MSX Programme's Guide is the reference 
book Uia: vAW answer all your questiorts. 

Supercharge Your Commodore 64 gives your Commodore tne 
power of machine language. Without any additiona effort, 
yoj can overcome the I imitations o(B/*SIC. Not only will your 
programs lODk better, run faster, and have morespectacu ar 
graphicsand sound, but you vjiW also be able to develop 
them in a f rsction of the t me. Whetheryou a rs a beginnar cr 
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YOUR COMPUTER. FEBRUARY 1985 149 



QUICKBEAM SOFTWARE 

DICKIE DIVER 

Dsirt) Vk'.n Div'r. tivfis Oircp to 'he Destl-s o) tne :>8ik OiffY D»(TVsi« of Itifi 
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HOMF ArrntliMT.^ Pi* vnur hn 111' 1:1 Krnirl 
Probably the bc« homu um Icr wur 
computci Compr^herisve tovjrjgo >i biiik 
icco'jnts. crfdil cardi, HP. etc. Inbuiil 
tc.c.iuKv rh«<k fa all trarsactons. Procci 
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i77 



SUPERIOR SPECTRUM 
TAPE COPIER 



Tt< M.M W7 M*V II th: OM.V :o|iiir 
i'^ij^jl).'( <>: i;i»[tyn»-^' cvi'i» ;i lull 'l.S\ 
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• CiipKN cTultirnri pro^ianiv all in um: 
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• -juunimwd tmva lo uw. 

m\ spy IS JDST iJ.)5 
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/,x-(;iiA«*LMi:i:i)(i)tpi yo" 

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enhanced C.^T and I.O.^D. are offered with this vcr>' iiictul program. 

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152 YOUR COMPUTER. FEBRUARY -QBE 



CDC C^CH YOUFSELF MACHINE CODE LESSONS FOR 48K 
r n H CsPECTRUM with ROYBOT ASSEMBLER'DE3UGGER 

mcio(tive5uofort«d.D(iassembl2' plus advanced 'esiing'Deoti^girKiaciinos 'or 
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> All ttH.' tuMbI till!). liii i>ssH><, iIh,c dud carliidic 
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ai tveniode Uicse, Lodge Perk 

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Sinply tbo bast Coavinj an/ lfy4aK 
£p)etrvm 0ro^fsrn is aa ca^/ d^ 
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ctft noM bo b«cked-uo onto a fiasi 

IT CAN EVEN COPV ITSELF 

NEW 

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Z80 ASSI'MBIFIR 

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■ '■fnt*'«ii/v«»t tc> i:ol>mn lifiirp 
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• f -E .Se,f,NDIt vilh itxiin iikwcJ 

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• Supci fm — i|>pi(:>.\ .i.'XJOl n«s/min 

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Ssnd /ar§e S^£ fty full 

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Gtos. GL11 5TX. 

TeJ. 10453)46893/844061 



Spectrum Repairs 

£lfi9."i imiiifivi.' ul liibuuz. pans. 3&p 
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H.sroMPtnr.H .sV;it Vitus 

2TI i-Onhiinl. VVrirtm, ^'^^slo^, l.oncf.. 
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mm 

0QMPUI9 



CLASSIFIED 



ORDER FORM 



C ossified Kates 

LinDOo; SOp pof won) (Win 4) wordt) — 
prtpay^blc 


Please Insert the foflowing adyerlsement in Your Compute' C ossified Section 
















LINAGE 




poW fo> » osKf <n orfwi-rilonrif. Sen' Nitmifff 
It /iT^uAwcJ i^ £4.00 enlHi. 

Dlf play — rot«» ptr sc( (Mh 3Me) 

On*ini*HlQn Cf.07 
Th'oo iiwfliont E8.7J 
Sl> imtrtioni £6.53 




































£10.00 




Tv^vlvointATtioni tS.OJ 










£12.50 




CC^v ciroprffeii'ilf .•tSifvi SpKv Of !>>>OfW 

(0! 66! 3036. 


1 
1 








£15.00 




Method of Payment 












£17.S0 




to BuEiiB&s Prais lnt»rn«tional Ltd, and 
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chsqusiPCior 

£ 












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Coid.'Ameiican ExptessDinofs Ciublod 
loibolow 










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ACOWSS.. 



8ICNATun£ 



Post to: 

Cul out tlia Drdo' lorm and ratjm 
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ClaMtrioJ Oniwrtnoni. YOJf Compue'. 
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YOUR COMPUTER, FEBRUARY 1935 153 






Hot-K 
lines 

Acorn Computers 

Telephone; Carrbfiaige 0223 ?iOni 

Atari 

Tetephone: Slough C753 24561 

Amstrad 

Telepncina: Brentwood 0.V7 228888 

Commodore CBM 
Enterprise 

Telcphono: 31-739*1282 

Oric 

ToUpncne: Cam:>rldga 02205 5141 

Sinclair 

Tolaphcne: ^ambf idge 0276 6B531 1 

Tandy Corporation 

leiipncnft: dirmngKim 021 SS66101 
0Xt33 

Toshiba 

Telipnons: CannDi>rr«y 0<76 Q222J 




Local, national and 
international micro 
events are updated 
here. To publicise 
your ev/ent, phone 
Paul Bond on 
01 661 3472. 

LET 

Short (br Inurna'iotu) Ttadr SJww 
l\v Hjmc Cotnputcrt, Soflwiire \nti 
[.ei<iiifc Hecifonirs. l-ron February 
17- 19 31 Olyinpia. Phone 
RcknuriTOonli {-WST) ""7000 I'ui 
marc inforniatioa 

Microprocessor 

Development 

Show 

You'll nctd a businc^ carU »r 4 
piri>ii»ivc dad (o cci into rhv ir> 
dtfXh hi-lxh cxp>. At Wembley 
Owicfcncc Ccniic rtnm l-etrtiaiy 
l.'-l-t, ])i^nil!> Irom I'rojtct 
PicMTiitutbiis Lid 01-212 l(\i\. 




Not Sir Qive demcnsir3l,ng the psrts o( yovr body most likely to 
be renoveo oy articuiaien lornes white driving a Sinc'air C-5, but 
one of 'The Cliv&s ' av/ards de$if,ncd by Dsvia Rcwe anil presented 
by Ouicksilva snd Bug-Byte. We won ours for the best show of 
1984! 



Apricot & Sirius 
Computer Show 

Frrm Febrtiarv *>•* :ii Kcn$inj;cor & 



Chctjcn Town Ilall A chance <o gn 
youi liands m iti u>mirkct 
iiuichiiiK t^cciilt Ircm Paradox 
Group C1-2-H 235-t 



• 


INDEX OF ADVERTISERS 






A 




Haulsterm 


66 


P 






ARC CArcM\i*'tnn 


Xi 


HitofI 


8 


PV "ubco 


106 




A:orn Compotes 


14,15 


Holt Saun jers 


120 


Pictjrnsquc 


92 




Addlcllve Games 


140 












ASvnitute Iriernatlonal 


92 


1 











AiialiaJ 


7a. n 


interface 


25 


Quicksilva 


7 




Anirog 


IQC 












A'qui Press Soltv^are 


11 


K 




S 






Arief Software 


19 


KSofl 


101 


RMT 


t09 








K-Tel 


42 


Swafvlev Electronics 


60 




B 




Kuna Conpulcrs 


41 


Saga Sysieiis 


75 




B:tcbug 


141 






Seine Soft^yare 


92 




B:lo4oft 


00 


L 




Sifitlair Hesearch 


104 




Bjgbyle 


IFC 


LCL 


141 


Soft%varc Library 


106 








Level 9 


10 


Solo Software 


101 




C 




Llamasofl 


94 


Swosr.oi 


RO 




CDmmodorc 


36 












Computer Llrvk 


76 


M 




- 






C-ablreo Trading Systems 72 


Mail Crde- 




"he Microwofkshoo 


66 




C-jmana 


12, 13 


Protootiari SohiiiK 


72 


"huutili.^ & Ciosseii 


ao 








Melbourne IHcusc 


146. 14/ 


"oshibs 


59 









Memo-ex JK 


20,21 


"ymac 


86 




D^CC 


8 


Metacamco 


119 








DEH 


49 


Micro Heripherals 


9 


u 






Dstaslar 


30 


MIcroit 


53 


USGoW 6,18,38,70 


,90. 




Datcl 


96 


Microt-uslness 


32 


102, 116.122, 139 


142 




D^nnlfirtn 141. 
SCO Technology 


i4r^ 14R 
34 


Mlcrofoirf 
Microp-ower 


101 
144 


Ultimate Ptay tnc came 16, u 




DDClorscft 


52 


Micropride 


59 


V 

Visionstoro 






Oant VA^ th5 Piess 


8 


Microvitcc 
MIkrogen 


44 


77 




E 




Miles Better Software 


112 








Euro Electronics 


112 


Mirage Soilv/are 


110 


W 

Walker Gompulers 


112 




F 




N 




Wtltiain Stuart 


72 




First Publishing 


64 


Natioral Software Librar/ 76 


Win'crsoft 
Wizard 


124 
143 




Frel Ltd 


78 


Ne^ Generation 


100 




G 

G3E Totoring 


143 




Oasis Software 


115 


Y 

Your Computer Ch ps 


134 




Gilsoft 


63 


Ocean Gaines 
OcjanSollware 


BC 


Your Computer Cl^ssilicd 


138 




H 




Ox'ordCcmpjiei 




2 






Handle 


71 


Publishing 


84 85 


2X Micro Fair 


68 





154 YOUR COMPUTER. FEBRUARY 1985 



COMMODORE C1 6 AND PLUS 4 



T AS VEGAS 





ZODIAC 



OUT ON A WMB 



MOON BUGGY 



r^-'-wt^ 






3D TIME TREK 





SKRAMBLE 



'^^['URBO FAST LOADER 

LAS VEGAS Las Vegas brings all the 
challenges of a dclaxe arcade friiit machine 
direct to your finusnps iv.any cxcitir.g features 
include, gamble, cancel, collect, nudge ^nd number options, 
with a, three row display fcnd maximum paj-ou: ol 20B. 
K «. On.y C.16 £6.95 
ZODIAC This is an enthralling arcade adventure in whi;h the evil 
powers 3l' hell have scattered the signs of thtr 7.n(\istr. n -he four aundrod 
chambers of the abyss. Struggle to collect t.iese signs and at the same time try lo 
liliilsle every-.hing m your way. How long car. you stav ahve? 
.;.<?. or K n r »«P6.05 
FETCH Race Petch around the screen, movin? ice fclock.s to alter the maze, however, beware of the^ 
nasty monsters who are constantly chasing Pach asyou attempt to collect the bonus cherries. Also if you 
ca-n touL-h ih« ed^o Df the mazo the lu^nstcra will suddenly burst in:o naiii«tj, Uul look out they'll stMin bo back! 
JS. or K.I). C.16 £€.95 
MOON BUGGY You must skillfu.ly manoeuvre your jumping patrol vehicle over dangerous noon craters as wellaslargs 
boulders and cunningly placed iuii>c;«. Nji only tills but avoid the hcvcrmg alien spsice^hip as it bombards ytu from above. 
J.S. or X.B. C.W ££.95 

3DTIME TREK Ae eole eurvivor of Iho planot "Corillioii"your cucat ia one of angor and revenge. Theatarahipyou are flying is full of 
the latest inboard computers End extra pcwerful sensors. Also included are full 3D graphics, to add anbelievable realism to this 
fantastic ourney through t:me itself, and oeyond. 
J.S.utiJK.B. C.i6i:6.9S 

SKRAMBLE Earth has been overrun by the Cobrons and its up to you to tattle through the six ferocious tnd testing sec:ors. 
Adversaries include meteors, Ul'X)'? and deadly firebills. Fly through a.n ^irmnnrpH f!i».y, thun *ti elaborate mazt and finally the 
coirmand base itself. 
J.S. or KB. C.J 6 £6. S.") 

FLIGHT PATH Flight Path is wUhoui doubt the best flight simula'-or on theU A6aiidAinstrad.The mar.y elaborate features include; 
Altometer, flaps, directional headings, crosswinds, fires, ground warning lights and reverse thrust to name but & few. Also included 
are smooth graphics as vou take off. cruise over mountams, ard land once again. 
IS.andK.B. CA6L6.i>5 

OUT ON A LIMB Th:s is a fantastic and in parts outrageously funny game. Based on the fairytale of Jack and the Beanstalk. Out On A 
Limb is full of tho noot otrangc and c acentric characters yau are ev=r likely to meet.I'^ratly.cliinLthcalilkaiiJ juiiiputLLu ilieclcuds, 
then enter the giant's castle searching for treasures. However, watsh outfor vacuum cleaners, musical notes, televisions and potted 
plants, all of which chase you round the many and elaborate rooms of the castle. Once the treasure is collected the s.ngle exit will be 

(.ipeiiet., »:id then... ? 

J.S.orK.B. C.16 ££.95 



m^ 



Mail Ordar: 8 HIGH STREET H01LEY SURREY 24 HOUR CREDIT SALES HOP LEY 02934 6083 Payment by: P.O- ACCESS - VISA 

AVAILABLE FDOM YOUB COMPUTED <CTOBF 



i' a ' ?. r'i " '"T .i' 




3^ '^ 















GIFT FROM THE CODS 

^ -mm "The Power of Destiny" 

Number 1 Blockbuster from the "WIECA TEAM". ^^ 

Spectacular arcade - adventure played in a multitude of ways 

and at many different levels. 
Watch the Secrets of the Labyrinth unfold as ourHero. ORESTES, tests his skill 

against the power of GOD and MAN. | 

# stunning animated graphics take you beyond time ... | 

into the "FIFTH DIMENSION". I 

"INTELLIGENT" controls allow ORESTES to perform an astonishing repertoire 
of feats from the command of joystick or keyboard, .^aos: 
Discover the key to " acamemnoim'S puzzle, through the power of 
r intrigue and Illusion! ^m 



0:ear Software is avaifabe frum selected bruxhes rf IVDOCMOfrrN, WHSMllil ,(^^MWM^ LASKYS. Rumb«lows. COM^T. 
' Spectmin Shops and all good software dealers. Tracte enquiries welcome.